| 2006 |
SEC23A is an essential component of COPII-coated vesicles mediating ER-to-Golgi transport; the F382L missense mutation causes loss of SEC23A function in cell-free vesicle budding assays, leading to gross ER dilation and cytoplasmic mislocalization of SEC31 in patient fibroblasts, causing cranio-lenticulo-sutural dysplasia (CLSD). |
Positional cloning, cell-free vesicle budding assay, electron microscopy, immunofluorescence, zebrafish morpholino knockdown |
Nature genetics |
High |
16980979
|
| 2006 |
SEC23A is a core component of the COPII complex required for anterograde ER-to-Golgi trafficking; loss-of-function nonsense mutation (L402X) in zebrafish crusher mutant causes protein accumulation in distended ER of chondrocytes, severe reduction of type II collagen and cartilage ECM secretion, and craniofacial skeletal defects. The paralog SEC23B is also required for ECM secretion in chondrocytes, while COPI knockdown does not impair craniofacial morphogenesis. |
Positional cloning, live zebrafish imaging, immunofluorescence, electron microscopy, morpholino epistasis (COPI vs COPII) |
Nature genetics |
High |
16980978
|
| 2009 |
BBF2H7 (CREB3L2) directly binds a CRE-like sequence in the Sec23a promoter to activate its transcription in response to ER stress; Sec23a expression downstream of BBF2H7 is required for ER-to-Golgi transport of type II collagen and COMP in chondrocytes, and reintroduction of Sec23a into Bbf2h7−/− chondrocytes fully restores impaired transport and secretion of cartilage matrix proteins. |
Bbf2h7 knockout mouse, promoter binding assay, rescue by Sec23a re-expression, immunofluorescence, EM |
Nature cell biology |
High |
19767744
|
| 2011 |
miR-200s directly target the SEC23A 3′-UTR to suppress SEC23A expression, thereby reducing secretion of metastasis-suppressive proteins Igfbp4 and Tinagl1 from the COPII secretory pathway and promoting metastatic colonization. |
3′-UTR luciferase reporter, genomic and proteomic (secretome) analysis, functional rescue experiments, mouse metastasis models |
Nature medicine |
High |
21822286
|
| 2011 |
SEC23A protein is downregulated by miR-375 and miR-200c via their binding to the SEC23A 3′-UTR; ectopic overexpression of SEC23A in prostate cancer cell lines reduces cell growth without inducing apoptosis, whereas inhibition of SEC23A stimulates proliferation. |
3′-UTR reporter assay, Western blot, qRT-PCR, cell growth assays in LNCaP and DU145 cells |
Molecular cancer research : MCR |
Medium |
21593139
|
| 2012 |
BBF2H7-mediated induction of Sec23A via IGF-I signaling (through MAPK and PI3K pathways) is required for ER-to-Golgi trafficking of procollagen in dermal fibroblasts; knockdown of BBF2H7 reduces type I and III collagen expression and causes Golgi dysmorphology due to COPII hypoplasia. |
siRNA knockdown, immunofluorescence microscopy, Western blot, pathway inhibitor experiments |
The Journal of investigative dermatology |
Medium |
22495181
|
| 2013 |
ER stress impairs membrane association of Sec23A at ER exit sites (ERES), reducing COPII vesicle formation and modifying Sec23A cycling, establishing a dynamic interplay between protein folding status and COPII assembly. |
Immunofluorescence, membrane fractionation, ER stress induction with pharmacological agents |
FEBS letters |
Medium |
23994533
|
| 2015 |
SEC23A deficiency in mice causes mid-embryonic lethality with defective extraembryonic membrane development and neural tube opening; SEC23A is specifically required for secretion of multiple collagen types (but not fibronectin) in connective tissue cells, and its loss induces strong unfolded protein response in collagen-producing cells. SEC23B deficiency causes E-cadherin accumulation in pancreatic and salivary gland acini. Haploinsufficiency of one paralog on top of homozygous loss of the other causes earlier lethality, indicating partial functional overlap. |
Sec23a knockout mouse, immunofluorescence, Western blot, fractionation, genetic interaction (compound heterozygotes) |
Scientific reports |
High |
26494538
|
| 2017 |
ULK1 phosphorylates SEC23A at serine 207, serine 312, and threonine 405; phosphorylation at S207 reduces the interaction between SEC23A and SEC31A, causing aggregation of ERES and inhibition of ER-to-Golgi cargo transport during autophagy induction by amino acid starvation, rapamycin, or ULK1 overexpression. |
In vitro kinase assay, phospho-site mutagenesis, Co-IP (SEC23A–SEC31A interaction), live imaging of ERES, cargo transport assay |
BMC cell biology |
High |
28486929
|
| 2017 |
CREB3L2/BBF2H7 transcription factor drives isoform-specific upregulation of Sec23A (and Sec24D) during hepatic stellate cell (HSC) activation; knockdown of Sec23A abrogates HSC activation, indicating that Sec23A-mediated ER-to-Golgi trafficking is required for the differentiation of HSCs into myofibroblast-like cells. |
siRNA knockdown, Western blot, qRT-PCR, immunofluorescence, HSC activation model |
Scientific reports |
Medium |
28801610
|
| 2017 |
SEC23A is ubiquitylated on cysteine residues at positions 432 and 449 (unconventional cysteine ubiquitylation rather than lysine); this monoubiquitylation is not required for SEC23A degradation but modulates SEC23A interaction with the ER membrane and thereby influences COPII vesicle formation. |
Co-immunoprecipitation, mass spectrometry (Gly-Gly remnant detection), site-directed mutagenesis, immunofluorescence |
The open biochemistry journal |
Medium |
28553408
|
| 2018 |
Human SEC23A and SEC23B have indistinguishable intracellular protein interactomes; both complement yeast Sec23, and a sec23a-expressing transgene rescues sec23b-deficient zebrafish lethality. In mice, a Sec23a coding sequence knocked into the Sec23b locus completely rescues the lethal SEC23B-deficient pancreatic phenotype, demonstrating equivalent molecular function with tissue-specific expression differences accounting for distinct disease phenotypes. |
Mass spectrometry interactome, yeast complementation, zebrafish transgenic rescue, mouse knock-in |
Proceedings of the National Academy of Sciences of the United States of America |
High |
30065114
|
| 2018 |
Sec23a acts downstream of miR-200c; Sec23a expression suppresses oligometastatic-to-polymetastatic progression through its secretome, which modifies the tumor microenvironment, as shown by mass spectrometric profiling of secreted proteins from Sec23a-manipulated cells. |
In vitro and in vivo metastasis assays, miR-200c overexpression/Sec23a knockdown epistasis, mass spectrometry secretome analysis |
EBioMedicine |
Medium |
30301603
|
| 2020 |
SEC23A transports S100A8 in COPII vesicles into the extracellular space; secreted S100A8 inhibits metastatic colonization via autocrine activation of BECLIN1-dependent autophagy, defining a SEC23A–S100A8–BECLIN1–autophagy axis. |
Secretome mass spectrometry, siRNA knockdown, in vivo metastasis assay, autophagy markers (LC3, BECLIN1) |
Cell death & disease |
Medium |
32811814
|
| 2021 |
SEC23A transports PF4 via COPII vesicles; secreted PF4 cooperates with SPARC to inhibit the MAPK/ERK signaling pathway and suppress melanoma metastasis. |
Secretome analysis, Co-IP, siRNA knockdown, ERK phosphorylation assays, in vivo metastasis model |
International journal of biological sciences |
Medium |
34421345
|
| 2021 |
SEC23B-deficient HUDEP-2 erythroid cells exhibit features of congenital dyserythropoietic anemia type II (CDAII) upon differentiation; increased expression of SEC23A rescues this phenotype, confirming functional equivalence of the paralogs in human erythroid cells and suggesting a therapeutic strategy for CDAII. |
CRISPR knockout of SEC23B in HUDEP-2 cells, SEC23A overexpression rescue, erythroid differentiation assay |
Science advances |
High |
34818036
|
| 2021 |
miR-1227 directly targets SEC23A; inhibition of SEC23A by miR-1227 is sufficient to shift extracellular vesicle shedding from small EVs (exosomes) toward large EVs (large oncosomes), revealing a COPII-dependent mechanism controlling EV size distribution. |
RISCTRAP assay, RNA sequencing, luciferase reporter, Western blot, qPCR, EV size profiling |
Cancers |
Medium |
34831007
|
| 2022 |
Sec23a inhibits self-renewal of melanoma cancer stem cells by promoting ER stress, which activates FAM134B-induced ER-phagy (selective autophagy of the ER); inhibition of Sec23a reduces ER stress and consequently suppresses FAM134B-mediated ER-phagy, enhancing CSC self-renewal. |
CSC spheroid enrichment, siRNA knockdown, transmission electron microscopy, LC3/P62 autophagy markers, ER stress assays |
Cell communication and signaling : CCS |
Medium |
35236368
|
| 2023 |
ER stress-induced pY705-STAT3 transcriptionally upregulates SEC23A; elevated SEC23A then promotes autophagy by regulating the cellular localization of ANXA2, and the resulting SEC23A–ANXA2–autophagy axis protects gastric cancer cells from ER stress-induced apoptosis, forming a negative feedback loop. |
Luciferase reporter, ChIP assay, Co-IP, mass spectrometry, subcellular fractionation, in vitro and in vivo functional assays |
Journal of experimental & clinical cancer research : CR |
Medium |
37670384
|
| 2021 |
The E599K variant in SEC23A (monoallelic, inherited in dominant fashion) affects an ultra-conserved residue predicted by 3D structural modeling to be involved in direct binding between SEC23 and SAR1 subunits of the COPII coat, suggesting a dominant-negative mechanism disrupting SEC23 multimer function. |
Trio genome sequencing, 3D structural modeling of yeast SEC23–SAR1 interface, familial segregation |
American journal of medical genetics. Part A |
Low |
34580982
|
| 2012 |
TFII-I transcription factors (GTF2I/GTF2IRD1) are directly recruited to the SEC23A promoter in human neural crest progenitor cells, as shown by ChIP-chip, establishing SEC23A as a direct transcriptional target of TFII-I in craniofacial development. |
ChIP-chip with human RefSeq tiling promoter arrays in neural crest progenitor cells |
The Cleft palate-craniofacial journal |
Medium |
23145914
|