STK19 | |||||||||||||||||||||||||||||||||||||||||||||||||||
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Identifiers | |||||||||||||||||||||||||||||||||||||||||||||||||||
Aliases | STK19 , D6S60, D6S60E, G11, HLA-RP1, RP1, serine/threonine kinase 19 | ||||||||||||||||||||||||||||||||||||||||||||||||||
External IDs | OMIM: 604977; MGI: 1860085; HomoloGene: 10449; GeneCards: STK19; OMA:STK19 - orthologs | ||||||||||||||||||||||||||||||||||||||||||||||||||
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Wikidata | |||||||||||||||||||||||||||||||||||||||||||||||||||
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Serine/threonine-protein kinase 19 is a protein that in humans is encoded by the STK19 gene [5] [6] [7] and is involved in DNA repair, specifically the Transcription Coupled Nucleotide Excision Repair Pathway (TC-NER). [8] [9]
The name is misleading — although STK19 was initially identified as a serine/threonine kinase, analysis of the crystal structure revealed absence of the kinase domain [10] and it does not seem to possess any kinase activity. [11]
This gene localizes to the major histocompatibility complex (MHC) class III region on chromosome 6 and expresses two transcript variants. [7]
STK19 contains 3 different protein-interaction domains, which are essential to its function in DNA repair: the CSA interacting domain, RNA Polymerase II (RNAPII) interacting domain, and UVSSA interacting domain. [9] These domains allow STK19 to incorporate into the Transcription-Coupled DNA Repair (TCR) complex, which is recruited to RNA Polymerase II stalled at DNA lesions. [9]
Part of the UVSAA binding domain may also interact with XPD, a protein in the TFIIH (transcription factor IIH) complex. This complex is recruited to the TCR and is involved in excising the damaged DNA. STK19 binding to XPD is theorized to help optimally position the TFIIH ATPase subunits XPD and XPB onto the DNA in front of the lesion. [9]
STK19 is involved in Transcription Coupled Nucleotide Excision Repair (TC-NER), a DNA repair pathway that preferentially detects and removes DNA damage in portions of the genome that are being actively transcribed (copied from DNA into RNA). (By contrast, the non-transcribed strand and portions of the genome not under active transcription are repaired more slowly, using Global Genome Nucleotide Excision Repair or GG-NER). [8]
Nucleotide excision repair is a DNA repair mechanism. DNA damage occurs constantly because of chemicals, radiation and other mutagens. Three excision repair pathways exist to repair single stranded DNA damage: Nucleotide excision repair (NER), base excision repair (BER), and DNA mismatch repair (MMR). While the BER pathway can recognize specific non-bulky lesions in DNA, it can correct only damaged bases that are removed by specific glycosylases. Similarly, the MMR pathway only targets mismatched Watson-Crick base pairs.
XPB is an ATP-dependent DNA helicase in humans that is a part of the TFIIH transcription factor complex.
TFIIH subunit XPD is a protein that in humans is encoded by the ERCC2 gene. It is a component of the general transcription and DNA repair factor IIH (TFIIH) core complex involved in transcription-coupled nucleotide excision repair.
Transcription factor II H (TFIIH) is an important protein complex, having roles in transcription of various protein-coding genes and DNA nucleotide excision repair (NER) pathways. TFIIH first came to light in 1989 when general transcription factor-δ or basic transcription factor 2 was characterized as an indispensable transcription factor in vitro. This factor was also isolated from yeast and finally named TFIIH in 1992.
CDK7 is a cyclin-dependent kinase shown to be not easily classified. CDK7 is both a CDK-activating kinase (CAK) and a component of the general transcription factor TFIIH.
POU domain, class 2, transcription factor 1 is a protein that in humans is encoded by the POU2F1 gene.
Cyclin-dependent kinase 7, or cell division protein kinase 7, is an enzyme that in humans is encoded by the CDK7 gene.
M-phase inducer phosphatase 1 also known as dual specificity phosphatase Cdc25A is a protein that in humans is encoded by the cell division cycle 25 homolog A (CDC25A) gene.
LIM domain kinase 1 is an enzyme that in humans is encoded by the LIMK1 gene.
Cyclin-H is a protein that in humans is encoded by the CCNH gene.
DNA excision repair protein ERCC-6 is a protein that in humans is encoded by the ERCC6 gene. The ERCC6 gene is located on the long arm of chromosome 10 at position 11.23.
FACT complex subunit SSRP1 also known as structure specific recognition protein 1 is a protein that in humans is encoded by the SSRP1 gene.
Serine/threonine-protein kinase D2 or PKD2 is an enzyme that in humans is encoded by the PRKD2 gene.
DNA excision repair protein ERCC-8 is a protein that in humans is encoded by the ERCC8 gene.
General transcription factor IIH subunit 2 is a protein that in humans is encoded by the GTF2H2 gene.
Serine/threonine-protein kinase 38 is an enzyme that in humans is encoded by the STK38 gene.
General transcription factor IIH subunit 1 is a protein that in humans is encoded by the GTF2H1 gene.
General transcription factor IIH subunit 5 is a protein that in humans is encoded by the GTF2H5 gene.
RNA polymerase II holoenzyme is a form of eukaryotic RNA polymerase II that is recruited to the promoters of protein-coding genes in living cells. It consists of RNA polymerase II, a subset of general transcription factors, and regulatory proteins known as SRB proteins.
RCCX is a complex, multiallelic, and tandem copy number variation (CNV) human DNA locus on chromosome 6p21.3, a cluster located in the major histocompatibility complex (MHC) class III region. CNVs are segments of DNA that vary in copy number compared to a reference genome and play a significant role in human phenotypic variation and disease development. The RCCX cluster consists of one or more modules each having a series of genes close to each other: serine/threonine kinase 19 (STK19), complement 4 (C4), steroid 21-hydroxylase (CYP21), and tenascin-X (TNX).
STK19 involvement in DNA repair