SBF1

SET binding factor 1

Gene Function

Acts as an adapter for the phosphatase MTMR2 to regulate MTMR2 catalytic activity and subcellular location. Promotes the exchange of GDP to GTP, converting inactive GDP-bound Rab proteins into their active GTP-bound form. May function as a guanine nucleotide exchange factor (GEF) activating RAB28. Acts as a suppressor of autophagy in neurons. Together with its binding partner, the phosphatase MTMR2, plays a role in dephosphorylation of phosphoinositides critical for autophagy initiation and autophagosome maturation. Plays a role in positively regulating late-stage radial sorting of large caliber axons, a process leading to myelination by Schwann cells, possibly via regulating endosomal trafficking (By similarity). Inhibits myoblast differentiation in vitro and induces oncogenic transformation in fibroblasts Source: UniProt

Relationship to CMT

CMT4 AR
1 subtype
22q13.33
First described 2013

Subtype Inheritance Class OMIM Sentinel Publication
SubtypeCMT4B3 Inheritanceautosomal recessive ClassCMT4 OMIM615284 Sentinel Publication

2013 · 10.1212/WNL.0b013e31829a3421

Stored Identifiers

HGNC Aliases: MTMR5, DENND7A
hgnc_idHGNC:10542
ensembl_gene_idENSG00000100241
coords_grch38chr22:50443219-50483923
coords_grch37chr22:50883429-50913454
entrez_id6305
omim_gene603560
uniprot_idsO95248
refseq_accessionNM_001365819
mane_refseqNM_002972.4
mane_ensemblENST00000380817.8

ClinVar Variants

Pathogenic and likely pathogenic variants in SBF1, as classified in ClinVar, are read live from NCBI. Only aggregate germline records are shown. Uncertain and conflicting classifications are not. Experts in CMT makes no claim to the accuracy of ClinVar data. This index is provided for informational purposes only.

Review stars are ClinVar’s measure of how well a classification is supported: four for a practice guideline, three for an expert panel review, two for agreement among multiple submitters, one for a single submitter with criteria provided, and none where no criteria were provided.

Reported in CMT
Reported in Other Diseases

Reported in a disease other than CMT. Listed apart rather than counted as CMT variants.

Variants w/o a Recorded Disease

Pathogenic or likely pathogenic in ClinVar, submitted without a disease recorded.

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