XPC Involved in global genome nucleotide excision repair (GG-NER) by acting as damage sensing and DNA-binding factor component of the XPC complex. Has only a low DNA repair activity by itself which is stimulated by RAD23B and RAD23A. Has a preference to bind DNA containing a short single-stranded segment but not to damaged oligonucleotides. This feature is proposed to be related to a dynamic sensor function: XPC can rapidly screen duplex DNA for non-hydrogen-bonded bases by forming a transient nucleoprotein intermediate complex which matures into a stable recognition complex through an intrinsic single-stranded DNA-binding activity. The XPC complex is proposed to represent the first factor bound at the sites of DNA damage and together with other core recognition factors, XPA, RPA and the TFIIH complex, is part of the pre-incision (or initial recognition) complex. The XPC complex recognizes a wide spectrum of damaged DNA characterized by distortions of the DNA helix such as single-stranded loops, mismatched bubbles or single-stranded overhangs. The orientation of XPC complex binding appears to be crucial for inducing a productive NER. XPC complex is proposed to recognize and to interact with unpaired bases on the undamaged DNA strand which is followed by recruitment of the TFIIH complex and subsequent scanning for lesions in the opposite strand in a 5'-to-3' direction by the NER machinery. Cyclobutane pyrimidine dimers (CPDs) which are formed upon UV-induced DNA damage esacpe detection by the XPC complex due to a low degree of structural perurbation. Instead they are detected by the UV-DDB complex which in turn recruits and cooperates with the XPC complex in the respective DNA repair. In vitro, the XPC:RAD23B dimer is sufficient to initiate NER; it preferentially binds to cisplatin and UV-damaged double-stranded DNA and also binds to a variety of chemically and structurally diverse DNA adducts. XPC:RAD23B contacts DNA both 5' and 3' of a cisplatin lesion with a preference for the 5' side. XPC:RAD23B induces a bend in DNA upon binding. XPC:RAD23B stimulates the activity of DNA glycosylases TDG and SMUG1. Belongs to the XPC family. 3 alternatively spliced human isoforms have been reported. Note: This description may include information from UniProtKB.
Protein type: DNA repair, damage
Chromosomal Location of human Ortholog: 3p25.1
Cellular Component:  cytoplasm; intracellular membrane-bounded organelle; mitochondrion; nucleolus; nucleoplasm; nucleotide-excision repair complex; nucleus; plasma membrane; XPC complex
Molecular Function:  bubble DNA binding; damaged DNA binding; heteroduplex DNA loop binding; protein binding; protein-containing complex binding; single-stranded DNA binding
Biological Process:  DNA repair; global genome nucleotide-excision repair; intra-S DNA damage checkpoint; nucleotide-excision repair; nucleotide-excision repair, DNA damage recognition; nucleotide-excision repair, DNA duplex unwinding; nucleotide-excision repair, preincision complex assembly; regulation of mitotic cell cycle phase transition; response to auditory stimulus; response to drug; response to UV-B; UV-damage excision repair
Disease: Xeroderma Pigmentosum, Complementation Group C
Reference #:  Q01831 (UniProtKB)
Alt. Names/Synonyms: DNA repair protein complementing XP-C cells; mutant xeroderma pigmentosum group C; p125; RAD4; Xeroderma pigmentosum group C-complementing protein; xeroderma pigmentosum, complementation group C; XP3; XPC; XPC complex subunit, DNA damage recognition and repair factor; XPCC
Gene Symbols: XPC
Molecular weight: 105,953 Da
Basal Isoelectric point: 9.03  Predict pI for various phosphorylation states
Protein-Specific Antibodies, siRNAs or Recombinant Proteins from Cell Signaling Technology® Total Proteins
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XPC

Protein Structure Not Found.


Cross-references to other databases:  AlphaFold  |  STRING  |  cBioPortal  |  Wikipedia  |  Reactome  |  neXtProt  |  Protein Atlas  |  BioGPS  |  Pfam  |  RCSB PDB  |  Phospho3D  |  Phospho.ELM  |  NetworKIN  |  GeneCards  |  UniProtKB  |  Entrez-Gene  |  GenPept  |  Ensembl Gene  |  InnateDB  |  Ensembl Protein