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Details on Person UniProt:Q15532 SS18

Class:IdReferenceGeneProduct:65118
_chainChangeLoginitiator methionine:1 added on Fri February 6 2015;chain:2-418 added on Fri February 6 2015;initiator methionine:1 for 65118 removed on Fri Nov 03 2023;initiator methionine: for 65118 added on Fri Nov 03 2023;initiator methionine: for 65118 removed on Fri Aug 15 2025;initiator methionine:1 for 65118 added on Fri Aug 15 2025
_displayNameUniProt:Q15532 SS18
_timestamp2025-08-15 22:12:12
chaininitiator methionine:1
chain:2-418
checksum7E089D557538252F
commentFUNCTION Appears to function synergistically with RBM14 as a transcriptional coactivator. Isoform 1 and isoform 2 function in nuclear receptor coactivation. Isoform 1 and isoform 2 function in general transcriptional coactivation. Component of SWI/SNF chromatin remodeling subcomplex GBAF that carries out key enzymatic activities, changing chromatin structure by altering DNA-histone contacts within a nucleosome in an ATP-dependent manner (PubMed:29374058).SUBUNIT Interacts with MLLT10. Isoform 1 interacts with RBM14 isoform 1. Isoform 2 interacts with RBM14 isoform 1. Component of the multiprotein chromatin-remodeling complexes SWI/SNF: SWI/SNF-A (BAF), SWI/SNF-B (PBAF) and related complexes. The canonical complex contains a catalytic subunit (either SMARCA4/BRG1/BAF190A or SMARCA2/BRM/BAF190B) and at least SMARCE1, ACTL6A/BAF53, SMARCC1/BAF155, SMARCC2/BAF170, and SMARCB1/SNF5/BAF47. Other subunits specific to each of the complexes may also be present permitting several possible combinations developmentally and tissue specific. Component of the SWI/SNF (GBAF) subcomplex, which includes at least BICRA or BICRAL (mutually exclusive), BRD9, SS18, the core BAF subunits, SMARCA2/BRM, SMARCA4/BRG1/BAF190A, ACTL6A/BAF53, SMARCC1/BAF155, and SMARCD1/BAF60A (PubMed:29374058).INTERACTION Fairly ubiquitously expressed. Expressed in synovial sarcomas and in other human cell lines. The fusion genes SSXT-SSX1 and SSXT-SSX2 are expressed only in synovial sarcomas.DISEASE A chromosomal aberration involving SS18 may be a cause of synovial sarcoma. Translocation t(X;18)(p11.2;q11.2). The translocation is specifically found in more than 80% of synovial sarcoma. The fusion products SSXT-SSX1 or SSXT-SSX2 are probably responsible for transforming activity. Heterogeneity in the position of the breakpoint can occur (low frequency).SIMILARITY Belongs to the SS18 family.SEQUENCE CAUTION Extended N-terminus.SEQUENCE CAUTION Extended N-terminus.
descriptionrecommendedName: Protein SSXT alternativeName: Protein SYT alternativeName: Synovial sarcoma translocated to X chromosome protein
geneNameSS18
SSXT
SYT
identifierQ15532
isSequenceChangedFALSE
keyword3D-structure
Acetylation
Activator
Alternative splicing
Chromosomal rearrangement
Nucleus
Proteomics identification
Proto-oncogene
Reference proteome
Repeat
Transcription
Transcription regulation
modified[InstanceEdit:9836292] Weiser, Joel, 2023-05-25
[InstanceEdit:9852000] Weiser, Joel, 2023-11-03
[InstanceEdit:9926675] Weiser, Joel, 2024-11-03
[InstanceEdit:9963647] Weiser, Joel, 2025-08-15
nameSS18
referenceDatabase[ReferenceDatabase:2] UniProt
referenceGene[ReferenceDNASequence:9001460] ENSEMBL:ENSG00000141380 SS18 [Homo sapiens]
secondaryIdentifierSSXT_HUMAN
B0YJ95
Q16404
Q4VAX1
Q9BXC6
sequenceLength418
species[Species:48887] Homo sapiens
(isoformParent)[ReferenceIsoform:154371] UniProt:Q15532-2 SS18 [Homo sapiens]
[ReferenceIsoform:405861] UniProt:Q15532-1 SS18 [Homo sapiens]
(referenceEntity)[EntityWithAccessionedSequence:9727441] SS18 [nucleoplasm] [Homo sapiens]
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