NP_000391.1
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NCBI GenBank Nucleotide #
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UniProt Primary Accession #
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UniProt Secondary Accession #
UniProt Related Accession #
Molecular Weight
46,274 Da
NCBI Official Full Name
general transcription and DNA repair factor IIH helicase subunit XPD isoform 1
NCBI Official Synonym Full Names
ERCC excision repair 2, TFIIH core complex helicase subunit
NCBI Official Synonym Symbols
EM9; TTD; XPD; TTD1; COFS2; TFIIH [Similar Products]
NCBI Protein Information
general transcription and DNA repair factor IIH helicase subunit XPD
UniProt Protein Name
General transcription and DNA repair factor IIH helicase subunit XPD
UniProt Synonym Protein Names
Basic transcription factor 2 80 kDa subunit; BTF2 p80; CXPD; DNA excision repair protein ERCC-2; DNA repair protein complementing XP-D cells; TFIIH basal transcription factor complex 80 kDa subunit; TFIIH 80 kDa subunit; TFIIH p80; Xeroderma pigmentosum group D-complementing protein
UniProt Synonym Gene Names
XPD; XPDC; TFIIH subunit XPD; BTF2 p80; TFIIH 80 kDa subunit; TFIIH p80 [Similar Products]
NCBI Summary for XPD
The nucleotide excision repair pathway is a mechanism to repair damage to DNA. The protein encoded by this gene is involved in transcription-coupled nucleotide excision repair and is an integral member of the basal transcription factor BTF2/TFIIH complex. The gene product has ATP-dependent DNA helicase activity and belongs to the RAD3/XPD subfamily of helicases. Defects in this gene can result in three different disorders, the cancer-prone syndrome xeroderma pigmentosum complementation group D, trichothiodystrophy, and Cockayne syndrome. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2008]
UniProt Comments for XPD
ATP-dependent 5'-3' DNA helicase, component of the general transcription and DNA repair factor IIH (TFIIH) core complex, which is involved in general and transcription-coupled nucleotide excision repair (NER) of damaged DNA and, when complexed to CAK, in RNA transcription by RNA polymerase II. In NER, TFIIH acts by opening DNA around the lesion to allow the excision of the damaged oligonucleotide and its replacement by a new DNA fragment. The ATP-dependent helicase activity of XPD/ERCC2 is required for DNA opening. In transcription, TFIIH has an essential role in transcription initiation. When the pre-initiation complex (PIC) has been established, TFIIH is required for promoter opening and promoter escape. Phosphorylation of the C-terminal tail (CTD) of the largest subunit of RNA polymerase II by the kinase module CAK controls the initiation of transcription. XPD/ERCC2 acts by forming a bridge between CAK and the core-TFIIH complex. Involved in the regulation of vitamin-D receptor activity. As part of the mitotic spindle-associated MMXD complex it plays a role in chromosome segregation. Might have a role in aging process and could play a causative role in the generation of skin cancers.
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Pathways associated with XPD rtu elisa kit
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