Affinage

SP8

Transcription factor Sp8 · UniProt Q8IXZ3

Length
490 aa
Mass
48.7 kDa
Annotated
2026-04-28
38 papers in source corpus 22 papers cited in narrative 22 extracted findings

Mechanistic narrative

Synthesis pass · prose summary of the discoveries below

SP8 is a zinc-finger transcription factor that acts as a central integrator of Wnt, FGF, and BMP signaling during embryonic patterning, neurogenesis, and ciliogenesis. SP8 directly binds GC-box elements in promoters and enhancers of target genes including Fgf8, Ccnd1 (Cyclin D1), and Six3, functioning as a transcriptional activator that sustains signaling center identity in the limb AER, anterior neural ridge, isthmic organizer, and telencephalon (PMID:17509151, PMID:14526104, PMID:29967281, PMID:29599703). SP8 also serves as a coactivator of Wnt/β-catenin signaling by binding GC boxes adjacent to Tcf/Lef sites and facilitating β-catenin recruitment to Wnt-responsive enhancers (PMID:26969725). In the nervous system, SP8 controls the generation, specification, and tangential migration of multiple neuronal populations—including olfactory bulb interneurons, striatal D2 medium spiny neurons, cortical interneurons, and amygdalar intercalated cells—through transcriptional regulation of downstream effectors such as Six3, Prokr2, Tshz1, EphA3, and Cxcl14, and through cross-repressive interactions with transcription factors including COUP-TF1 and Nkx2-2 (PMID:16476661, PMID:28981617, PMID:31070778, PMID:24948600). SP8, together with SP5, is required for primary and motile cilia formation, and SP8 expression alone is sufficient to induce primary cilia in unciliated cells (PMID:40875857).

Mechanistic history

Synthesis pass · year-by-year structured walk · 11 steps
  1. 2003 High

    Establishing that SP8 is essential for limb AER maturation downstream of Wnt3/Fgf10/BMP signaling resolved the identity of a missing transcription factor linking proximal signaling cascades to AER gene expression.

    Evidence Sp8 null mouse analysis with in situ hybridization and genetic epistasis

    PMID:14526104

    Open questions at the time
    • Direct DNA targets of SP8 in the AER were not identified
    • Whether SP8 acts cell-autonomously in AER precursors was not resolved
  2. 2004 High

    Demonstrating that SP8 positively regulates Fgf8 expression across chick and zebrafish established a conserved SP8→Fgf8 transcriptional axis required for limb outgrowth.

    Evidence Chick overexpression, dominant-negative constructs, and zebrafish morpholino knockdown with in situ hybridization

    PMID:15358670

    Open questions at the time
    • Whether SP8 binds Fgf8 regulatory DNA directly was not yet shown
    • Redundancy with other Sp family members was unexplored
  3. 2006 High

    Conditional inactivation in the ventral telencephalon revealed SP8 as a required factor for olfactory bulb interneuron generation, specification, and migration, extending its role from limb patterning to neurogenesis.

    Evidence Conditional Cre-lox knockout in mice with immunohistochemistry and apoptosis assays

    PMID:16476661

    Open questions at the time
    • Downstream transcriptional targets mediating interneuron specification were unknown
    • Redundancy with SP9 in this context was not addressed
  4. 2007 High

    In vitro transcriptional assays and in vivo electroporation proved SP8 directly binds Fgf8 regulatory elements and activates Fgf8 transcription, while also establishing reciprocal Fgf8-Sp8 induction and SP8's role in cortical area patterning via Emx2/Pax6 gradient modulation.

    Evidence In vitro DNA-binding/transcriptional activation assays, in utero electroporation (gain- and loss-of-function), conditional KO in mouse telencephalon

    PMID:17470284 PMID:17509151

    Open questions at the time
    • Genome-wide binding profile of SP8 was not determined
    • Whether SP8 acts as a pioneer factor or requires co-factors for chromatin access was unknown
  5. 2013 High

    Reciprocal misexpression experiments between SP8 and COUP-TF1 established a cross-repressive circuit governing cortical arealization, while parallel work showed SP8 in the ANR/olfactory pit is required for Fgf8/17 expression and neural crest survival.

    Evidence Binary transgenic misexpression in mouse telencephalon; multiple conditional Cre lines with microarray and pharmacological rescue

    PMID:23307639 PMID:23872235

    Open questions at the time
    • Whether SP8 directly represses COUP-TF1 at the transcriptional level was not determined
    • Non-cell-autonomous effects on neural crest were inferred but not fully dissected
  6. 2014 High

    Compound Sp6/Sp8 conditional knockouts demonstrated dose-dependent redundancy between SP8 and SP6 in mediating Wnt/BMP-dependent AER induction, while parallel work in spinal cord and inner ear revealed SP8 as a boundary-setting transcription factor through cross-repression with Nkx2-2 and as sufficient for otic vesicle induction.

    Evidence Double conditional KO mice (limb), in vivo electroporation with dominant-negative constructs (spinal cord), ENU mutagenesis/TALEN/morpholino/overexpression in Xenopus (inner ear)

    PMID:24722637 PMID:24948600 PMID:25166858

    Open questions at the time
    • Whether SP8 and SP6 have identical or distinct DNA-binding specificities was not resolved
    • Downstream effectors of SP8 in inner ear induction were not identified
  7. 2016 High

    ChIP and double-mutant genetics demonstrated that SP8 (with SP5) functions as a Wnt/β-catenin transcriptional coactivator by binding GC boxes and facilitating β-catenin recruitment to Tcf/Lef-bound enhancers, revealing a feed-forward amplification mechanism.

    Evidence ChIP in mouse embryos and differentiating ESCs, Sp5/8 double null mutants, Wnt reporter assays

    PMID:26969725

    Open questions at the time
    • Structural basis of SP8–Tcf/Lef interaction was not determined
    • Whether this coactivator role applies in all Wnt-responsive tissues was untested
  8. 2018 High

    ChIP-Seq and conditional double knockouts of Sp8/Sp9 identified Six3, Prokr2, and Tshz1 as critical transcriptional targets through which SP8/SP9 control D2 MSN generation and OB interneuron differentiation/migration, while SP8 was also shown to directly bind and activate the Ccnd1 locus during corticogenesis.

    Evidence ChIP-Seq, RNA-Seq, conditional double KO mice, genome-wide ChIP plus in vitro binding assays

    PMID:28981617 PMID:29599703 PMID:29967281

    Open questions at the time
    • Whether SP8 and SP9 bind identical or distinct genomic sites was not fully resolved
    • How SP8 modulates PAX6-mediated Ccnd1 repression mechanistically remains unclear
  9. 2019 Medium

    Conditional Sp8/9 double knockouts in CGE and MGE lineages showed that SP8 regulates cortical interneuron tangential migration through downstream targets including EphA3, Cxcl14, and guidance molecules, extending its role to both CGE- and MGE-derived populations.

    Evidence Conditional double KO mice with multiple Cre drivers, migration analysis, in situ hybridization

    PMID:31001083 PMID:31070778

    Open questions at the time
    • Direct binding of SP8 to EphA3 and Cxcl14 regulatory elements was not demonstrated
    • Relative contributions of SP8 versus SP9 to each interneuron subtype remain unclear
  10. 2020 High

    ChIP confirmed direct SP8 binding to the FGF8 promoter in hepatoblastoma cells, and CRISPR-dCas9 epistasis established FGF8 as the essential mediator of SP8-driven tumor cell migration and EMT, extending the SP8→FGF8 axis to oncogenic contexts.

    Evidence ChIP, CRISPR-dCas9 interference against FGF8, migration/invasion assays in hepatoblastoma cell lines

    PMID:32824198

    Open questions at the time
    • Whether SP8 drives tumorigenesis in vivo was not tested
    • Generalizability beyond hepatoblastoma is unknown
  11. 2025 High

    Discovery that SP5/SP8 double mutants lose primary and motile cilia—and that SP8 alone suffices to induce primary cilia in unciliated cells—revealed an unexpected role in ciliogenesis distinct from its transcription factor functions in patterning.

    Evidence Conditional double KO mouse embryos, stem cell differentiation, SP8 overexpression in unciliated cells, transcriptomics

    PMID:40875857

    Open questions at the time
    • Which ciliogenesis genes are direct SP8 transcriptional targets is not resolved
    • Whether SP8 has a structural role at the cilium or acts solely through transcription is unknown

Open questions

Synthesis pass · forward-looking unresolved questions
  • Open question: what is the genome-wide enhancer logic by which SP8 selects tissue-specific targets among its diverse developmental programs (limb, brain, cilia, inner ear), and how are SP8 and SP9 functionally partitioned?
  • No comprehensive SP8-specific ChIP-Seq across multiple tissues exists
  • SP8 versus SP9 DNA-binding specificity and chromatin occupancy differences are unresolved
  • Structural basis for SP8 interaction with Tcf/Lef and β-catenin is unknown

Mechanism profile

Synthesis pass · controlled-vocabulary classification · explore literature graph →
Molecular activity
GO:0140110 transcription regulator activity 7 GO:0003677 DNA binding 4
Localization
GO:0005634 nucleus 3
Pathway
R-HSA-112316 Neuronal System 6 R-HSA-1266738 Developmental Biology 6 R-HSA-74160 Gene expression (Transcription) 6 R-HSA-162582 Signal Transduction 4 R-HSA-1852241 Organelle biogenesis and maintenance 1
Partners
COUP-TF1CTNNB1EMX2PAX6SP5SP6SP9TCF7

Evidence

Reading pass · 22 per-paper findings extracted from the source corpus
Year Finding Method Journal Conf PMIDs
2003 SP8 functions downstream of Wnt3, Fgf10, and Bmpr1a in the signaling cascade mediating AER formation; Sp8 null mice show severe limb truncations and neuropore closure defects, with AER precursor cells induced but failing to maintain marker gene expression and progress to a mature AER. Targeted gene deletion in mice (Sp8 knockout), in situ hybridization for AER marker genes, genetic epistasis analysis Proceedings of the National Academy of Sciences of the United States of America High 14526104
2004 SP8 and SP9 are ectodermal targets of Fgf10 mesenchymal signaling; Wnt/β-catenin signaling positively regulates Sp8 (but not Sp9); overexpression of Sp8 in chick positively regulates Fgf8 expression, and dominant-negative Sp8 or morpholino knockdown in zebrafish abolishes Fgf8 expression and limb outgrowth. Chick overexpression, dominant-negative constructs, zebrafish morpholino knockdown, in situ hybridization Development (Cambridge, England) High 15358670
2006 SP8 is required for normal generation of calretinin-expressing and GABAergic/nondopaminergic olfactory bulb interneurons; conditional inactivation in the embryonic ventral telencephalon causes increased apoptosis in the lateral ganglionic eminence and rostral migratory stream, and neuroblasts are misspecified with abnormal migration. Conditional gene inactivation (Cre-lox) in mice, immunohistochemistry, cell death assays Neuron High 16476661
2006 In the absence of SP8, a posterior shift of the isthmic organizer occurs; Sp8 restricts Fgf8 expression at the isthmic organizer and controls cell proliferation in the mid- and hindbrain; loss of Sp8 causes ectopic Fgf8, Otx2, and Wnt1 expression in the rostral hindbrain. Sp8 knockout mouse analysis, in situ hybridization, immunostaining Development (Cambridge, England) Medium 16571633
2007 SP8 directly binds Fgf8 regulatory elements and acts as a direct transcriptional activator of Fgf8 in vitro; Fgf8 and Sp8 exhibit reciprocal induction in vivo in the embryonic telencephalon; Sp8 also induces ETS transcription factors downstream of Fgf8; Emx2 represses Sp8-mediated induction of Fgf8 in vitro; dominant-negative Sp8 in the commissural plate reduces Fgf8 expression and affects cortical area patterning. In vitro transcriptional assays, in utero electroporation (gain-of-function and dominant-negative), in vivo Fgf8/Sp8 induction experiments Neural development High 17509151
2007 SP8 is essential for anteroposterior patterning of the telencephalon by modulating Emx2 and Pax6 expression gradients; SP8 positively regulates Fgf8 in the medial wall and Nkx2.1 in the rostral MGE, independently of SHH and WNT signaling; SP8 is required for progenitor pool maintenance and preplate splitting during corticogenesis. Conditional inactivation (Cre-lox) in mice, in situ hybridization, immunostaining Neural development High 17470284
2013 SP8 misexpression throughout the telencephalon represses COUP-TF1 expression and promotes Fgf signaling; conversely, COUP-TF1 misexpression downregulates Sp8, demonstrating reciprocal cross-regulation; SP8 misexpression increases Fgf target molecule expression but does not upregulate Fgf8 or Fgf15 directly in this gain-of-function context. Binary transgenic misexpression system in mice, COUP-TF1 transgenic misexpression, in situ hybridization, immunostaining Cerebral cortex (New York, N.Y. : 1991) Medium 23307639
2013 SP8 is required in the anterior neural ridge (ANR) and olfactory pit signaling centers for Fgf8 and Fgf17 expression; loss of SP8 in these signaling centers (not neural crest cells directly) causes neural crest apoptosis and decreased proliferation; partial rescue achieved by reducing Sonic Hedgehog signaling. Conditional Sp8 knockout mice (multiple Cre lines), laser capture microdissection + microarray, in situ hybridization, immunostaining, SHH pathway inhibition Developmental biology High 23872235
2014 SP8 and Sp6 together are indispensable mediators of Wnt/β-catenin and BMP signaling in the limb ectoderm; combined loss of Sp6 and Sp8 prevents activation of both Fgf8 and En1 in the AER; SP8 links proximal-distal and dorsal-ventral patterning in a dose-dependent manner. Double conditional knockout mice (Sp6/Sp8), in situ hybridization for Fgf8 and En1, genetic dosage analysis PLoS genetics High 25166858
2014 SP8 acts as a transcriptional activator and establishes the pMN/p3 domain boundary in spinal cord through mutually repressive interactions with Nkx2-2; changing Sp8 expression shifts pMN and p3 progenitor fates; Sp8 expression is positively regulated by Pax6; SP8 plays a supplementary role to Pax6 in rostrocaudal patterning of the spinal cord. In vivo electroporation (gain- and loss-of-function), dominant-negative Sp8 construct, double mutant (Sp8/Pax6) analysis, in situ hybridization Development (Cambridge, England) High 24948600
2014 Sp8 depletion in Xenopus tropicalis causes otic dysmorphogenesis (enlarged, uncompartmentalized otic vesicles); overexpression of sp8 is sufficient to induce ectopic otic vesicles with sensory hair cells, neurofilament innervation, and otoconia, establishing Sp8 as sufficient for inner ear initiation and elaboration. Forward genetic screen (ENU mutagenesis), positional cloning, TALEN loss-of-function, morpholino knockdown, mRNA overexpression in Xenopus tropicalis Proceedings of the National Academy of Sciences of the United States of America High 24722637
2016 SP5 and SP8 function as transcriptional coactivators in the Wnt/β-catenin pathway by binding directly to GC boxes in Wnt target gene enhancers and to adjacent or distal chromatin-bound Tcf1/Lef1 to facilitate recruitment of β-catenin to target gene enhancers; Sp5 is itself directly activated by Wnt signals, establishing a feed-forward loop. ChIP in mouse embryos and differentiating embryonic stem cells, genetic null mutations (Sp5/8 double mutant), Wnt pathway reporter assays Proceedings of the National Academy of Sciences of the United States of America High 26969725
2018 SP8 and SP9 coordinately drive expression of Six3 in a spatially restricted domain of the LGE subventricular zone; conditional deletion of both Sp8 and Sp9 abolishes virtually all D2 MSNs due to reduced neurogenesis; ChIP-Seq shows SP9 directly binds the promoter and a putative enhancer of Six3, defining a transcription pathway for D2 MSN generation. Conditional deletion (Cre-lox), ChIP-Seq, RNA in situ hybridization, cell counting Development (Cambridge, England) High 29967281
2018 SP8 and SP9 coordinately regulate OB interneuron development; combined conditional deletion of Sp8 and Sp9 causes failure to express Prokr2 and Tshz1 in newly born neuroblasts, leading to defects in neuronal differentiation, tangential and radial migration, and increased cell death in the V-SVZ-RMS-OB system. Conditional double knockout mice, RNA-Seq, RNA in situ hybridization, cell counting, migration analysis Cerebral cortex (New York, N.Y. : 1991) High 28981617
2018 SP8 plays a dual role in postnatal neurogenesis: an early role controlling proliferation in all OB interneuron lineages, and a late role in long-term survival of calretinin+ periglomerular interneurons; SP8 is not required for early specification of calretinin+ interneurons. Fate mapping, transient and conditional genetic manipulation (Cre-lox), retroviral labeling, immunostaining Scientific reports Medium 30266956
2018 SP8 directly binds the Ccnd1 (Cyclin D1) locus at exon regions and in vitro experiments show SP8 binding activity on the Ccnd1 gene 3'-end; SP8 modulates PAX6-mediated repression of Ccnd1, and alteration of Sp8 expression in vivo affects Ccnd1 expression during early corticogenesis. Genome-wide ChIP, in vitro binding assays, mouse genetics (Sp8 gain/loss-of-function), in situ hybridization Frontiers in neuroscience Medium 29599703
2019 SP8 and SP9 coordinately regulate CGE-derived cortical interneuron development; conditional Sp8/9 knockout causes migration defects (longer leading processes, ectopic accumulation in CGE) and loss of CGE-derived interneurons, at least in part through repression of Pak3, Robo1, and Slit1; Cxcl14 expression in CGE-derived interneurons is critically dependent on SP8. Conditional double knockout (Gsx2-Cre, Dlx5/6-CIE), immunostaining, migration analysis, RNA in situ hybridization The Journal of comparative neurology Medium 31070778
2019 SP8/SP9 regulate MGE-derived PV+ cortical interneuron tangential migration at least in part through regulating expression of EphA3, Ppp2r2c, and Rasgef1b. Sp8/Sp9 double conditional knockout mice, immunostaining, in situ hybridization, migration analysis Frontiers in molecular neuroscience Medium 31001083
2020 SP8 directly transcriptionally activates FGF8 by binding to the FGF8 promoter (shown by ChIP); SP8 gain/loss-of-function promotes motility, self-renewal, migration, and invasion of hepatoblastoma cells; SP8 overexpression induces EMT; CRISPR-dCas9 interference against FGF8 shows FGF8 is essential for SP8-mediated aggressive tumor behavior. Chromatin immunoprecipitation (ChIP), CRISPR-dCas9 interference, gain/loss-of-function experiments, migration/invasion assays, EMT gene expression analysis Cancers High 32824198
2021 SP8 is required for normal generation of intercalated cells (ITCs) of the amygdala and OB interneurons from dLGE progenitors; misexpression of Sp8 increases ITC generation in a Tshz1 gene dosage-dependent manner and impairs rostral migration of OB interneurons. Genetic gain-of-function (misexpression) in mice, conditional KO, immunostaining, cell counting Cerebral cortex (New York, N.Y. : 1991) Medium 33230547
2025 SP5 and SP8 are required for primary and motile cilia formation in mammalian embryos; Sp5/8 double mutant embryos have shorter and fewer cilia, contributing to situs inversus and hydrocephalus; expression of SP8 alone is sufficient to induce primary cilia in unciliated cells. Conditional genetics in mouse embryos, stem cell differentiation assays, multi-omics (transcriptomics), SP8 overexpression in unciliated cells Science (New York, N.Y.) High 40875857
2025 SP5 and SP8 are essential regulators of neuromesodermal competent progenitor (NMC) maintenance; they cooperate with Tbxt, Tcf7, and Cdx2 to sustain a Wnt/Fgf autoregulatory network; SP5/8 bind a novel enhancer essential for Wnt3a expression; mechanistically, SP5/8 regulate the dynamic exchange of activating and repressive Tcf complexes at Wnt-responsive enhancers. Conditional genetics in mouse embryos, ChIP/chromatin binding assays, enhancer functional analysis, transcriptomics bioRxivpreprint Medium bio_10.1101_2025.06.03.657492

Source papers

Stage 0 corpus · 38 papers · ranked by NIH iCite citations
Year Title Journal Citations PMID
1994 Characterization of a cDNA encoding a novel DNA-binding protein, SPF1, that recognizes SP8 sequences in the 5' upstream regions of genes coding for sporamin and beta-amylase from sweet potato. Molecular & general genetics : MGG 408 7969025
2006 The zinc finger transcription factor Sp8 regulates the generation and diversity of olfactory bulb interneurons. Neuron 199 16476661
2004 Sp8 and Sp9, two closely related buttonhead-like transcription factors, regulate Fgf8 expression and limb outgrowth in vertebrate embryos. Development (Cambridge, England) 134 15358670
2003 Sp8 is crucial for limb outgrowth and neuropore closure. Proceedings of the National Academy of Sciences of the United States of America 110 14526104
2007 Sp8 exhibits reciprocal induction with Fgf8 but has an opposing effect on anterior-posterior cortical area patterning. Neural development 98 17509151
2007 Genetic interplay between the transcription factors Sp8 and Emx2 in the patterning of the forebrain. Neural development 80 17470284
1963 TRANSCRIPTION IN VIVO OF DNA FROM BACTERIOPHAGE SP8. Science (New York, N.Y.) 75 14056703
2018 SP8 and SP9 coordinately promote D2-type medium spiny neuron production by activating Six3 expression. Development (Cambridge, England) 55 29967281
2018 Transcription Factors Sp8 and Sp9 Coordinately Regulate Olfactory Bulb Interneuron Development. Cerebral cortex (New York, N.Y. : 1991) 54 28981617
2016 Sp5 and Sp8 recruit β-catenin and Tcf1-Lef1 to select enhancers to activate Wnt target gene transcription. Proceedings of the National Academy of Sciences of the United States of America 53 26969725
2004 The Sp8 zinc-finger transcription factor is involved in allometric growth of the limbs in the beetle Tribolium castaneum. Development (Cambridge, England) 47 14724124
2013 Sp8 and COUP-TF1 reciprocally regulate patterning and Fgf signaling in cortical progenitors. Cerebral cortex (New York, N.Y. : 1991) 40 23307639
2014 Sp6 and Sp8 transcription factors control AER formation and dorsal-ventral patterning in limb development. PLoS genetics 39 25166858
2014 From pre-DP, post-DP, SP4, and SP8 Thymocyte Cell Counts to a Dynamical Model of Cortical and Medullary Selection. Frontiers in immunology 30 24592261
2019 Transcription factors Sp8 and Sp9 regulate the development of caudal ganglionic eminence-derived cortical interneurons. The Journal of comparative neurology 29 31070778
2013 SP8 regulates signaling centers during craniofacial development. Developmental biology 28 23872235
2020 SP8 Promotes an Aggressive Phenotype in Hepatoblastoma via FGF8 Activation. Cancers 24 32824198
2009 A conserved function of the zinc finger transcription factor Sp8/9 in allometric appendage growth in the milkweed bug Oncopeltus fasciatus. Development genes and evolution 24 19760183
2014 The Drosophila Sp8 transcription factor Buttonhead prevents premature differentiation of intermediate neural progenitors. eLife 23 25285448
2004 Pur alpha and Sp8 as opposing regulators of neural gata2 expression. Developmental biology 23 15464585
2011 Acrosome reaction in the cumulus oophorus revisited: involvement of a novel sperm-released factor NYD-SP8. Protein & cell 22 21380641
2013 Genetic variants on 3q21 and in the Sp8 transcription factor gene (SP8) as susceptibility loci for psychotic disorders: a genetic association study. PloS one 17 23967141
2014 Sp8 regulates inner ear development. Proceedings of the National Academy of Sciences of the United States of America 14 24722637
2006 Sp8 controls the anteroposterior patterning at the midbrain-hindbrain border. Development (Cambridge, England) 13 16571633
2014 Sp8 plays a supplementary role to Pax6 in establishing the pMN/p3 domain boundary in the spinal cord. Development (Cambridge, England) 12 24948600
2012 Bambi and Sp8 expression mark digit tips and their absence shows that chick wing digits 2 and 3 are truncated. PloS one 12 23285181
2019 Transcription Factors Sp8 and Sp9 Regulate Medial Ganglionic Eminence-Derived Cortical Interneuron Migration. Frontiers in molecular neuroscience 11 31001083
2018 A dual role for the transcription factor Sp8 in postnatal neurogenesis. Scientific reports 11 30266956
2021 Temporally Distinct Roles for the Zinc Finger Transcription Factor Sp8 in the Generation and Migration of Dorsal Lateral Ganglionic Eminence (dLGE)-Derived Neuronal Subtypes in the Mouse. Cerebral cortex (New York, N.Y. : 1991) 9 33230547
2015 Sp8 expression in putative neural progenitor cells in guinea pig and human cerebrum. Developmental neurobiology 6 26585436
2018 SP8 Transcriptional Regulation of Cyclin D1 During Mouse Early Corticogenesis. Frontiers in neuroscience 5 29599703
2025 Transcription factors SP5 and SP8 drive primary cilia formation in mammalian embryos. Science (New York, N.Y.) 4 40875857
2016 Pf-Sp8/9, a novel member of the specificity protein family in Pinctada fucata, potentially participates in biomineralization. Journal of structural biology 4 27178782
2011 Preparation of anti-NYD-SP8 rabbit polyclonal antibody and its application in the analysis of NYD-SP8 expression in nasopharyngeal carcinoma cell lines and clinical tissues. Tumori 4 22158499
2004 Genomic structure and cloning of two transcript isoforms of human Sp8. BMC genomics 2 15533246
2021 Expression and Functional Analyses of Ectodermal Transcription Factors FoxJ-r, SoxF, and SP8/9 in Early Embryos of the Ascidian Halocynthia roretzi. Zoological science 1 33639715
2025 Transcription factors SP5 and SP8 drive primary cilia formation. bioRxiv : the preprint server for biology 0 40501818
2018 UTR-specific knockdown of Distal-less and Sp8 leads to new phenotypic variants in the flour beetle Tribolium. Development genes and evolution 0 29855703