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The plasmid vector incorporates the gene encoding the Human XRCC5 protein (251-455aa), generating recombinant plasmid, which is then introduced into baculovirus cells. Selection of positive baculovirus cells is based on their capacity to withstand a particular antibiotic. Subsequently, the baculovirus cells containing the recombinant plasmid are cultivated under conditions that facilitate the expression of the Human XRCC5 gene. The protein carries a N-terminal MBP tag and C-terminal 6xHis tag. Following expression, affinity purification is employed to isolate and purify the recombinant Human XRCC5 protein from the cell lysate. Denaturing SDS-PAGE is used to resolve the resulting recombinant protein, enabling an estimation of its purity, exceeding 85%.
The plasmid vector incorporates the gene encoding the Human XRCC5 protein (251-455aa), generating recombinant plasmid, which is then introduced into baculovirus cells. Selection of positive baculovirus cells is based on their capacity to withstand a particular antibiotic. Subsequently, the baculovirus cells containing the recombinant plasmid are cultivated under conditions that facilitate the expression of the Human XRCC5 gene. The protein carries a N-terminal MBP tag and C-terminal 6xHis tag. Following expression, affinity purification is employed to isolate and purify the recombinant Human XRCC5 protein from the cell lysate. Denaturing SDS-PAGE is used to resolve the resulting recombinant protein, enabling an estimation of its purity, exceeding 85%.
| Cat.No | ACP02350 | Target Name | XRCC5 |
|---|---|---|---|
| Form | Liquid or Lyophilized powder | Expression System | Baculovirus |
| Expression Range | 251-455aa | Mol Weight | 67.4 kDa |
| Protein Length | Partial | Purity | Greater than 85% as determined by SDS-PAGE. |
| Storage Buffer | 5%-50% glycerol. Lyophilized powder form: the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, Liquid form: default storage buffer is Tris/PBS-based buffer, pH 8.0. |
| Target Species | Human | Uniprot ID | P13010 |
|---|
Uniprot Id
P13010
Target Species
Human
Target Name
XRCC5
Target Full Name
X-ray repair cross-complementing protein 5
Target Function
Single-stranded DNA-dependent ATP-dependent helicase that plays a key role in DNA non-homologous end joining (NHEJ) by recruiting DNA-PK to DNA. Required for double-strand break repair and V(D)J recombination. Also has a role in chromosome translocation. The DNA helicase II complex binds preferentially to fork-like ends of double-stranded DNA in a cell cycle-dependent manner. It works in the 3'-5' direction. During NHEJ, the XRCC5-XRRC6 dimer performs the recognition step: it recognizes and binds to the broken ends of the DNA and protects them from further resection. Binding to DNA may be mediated by XRCC6. The XRCC5-XRRC6 dimer acts as regulatory subunit of the DNA-dependent protein kinase complex DNA-PK by increasing the affinity of the catalytic subunit PRKDC to DNA by 100-fold. The XRCC5-XRRC6 dimer is probably involved in stabilizing broken DNA ends and bringing them together. The assembly of the DNA-PK complex to DNA ends is required for the NHEJ ligation step. The XRCC5-XRRC6 dimer probably also acts as a 5'-deoxyribose-5-phosphate lyase (5'-dRP lyase), by catalyzing the beta-elimination of the 5' deoxyribose-5-phosphate at an abasic site near double-strand breaks. XRCC5 probably acts as the catalytic subunit of 5'-dRP activity, and allows to 'clean' the termini of abasic sites, a class of nucleotide damage commonly associated with strand breaks, before such broken ends can be joined. The XRCC5-XRRC6 dimer together with APEX1 acts as a negative regulator of transcription. In association with NAA15, the XRCC5-XRRC6 dimer binds to the osteocalcin promoter and activates osteocalcin expression. As part of the DNA-PK complex, involved in the early steps of ribosome assembly by promoting the processing of precursor rRNA into mature 18S rRNA in the small-subunit processome. Binding to U3 small nucleolar RNA, recruits PRKDC and XRCC5/Ku86 to the small-subunit processome. Plays a role in the regulation of DNA virus-mediated innate immune response by assembling into the HDP-RNP complex, a complex that serves as a platform for IRF3 phosphorylation and subsequent innate immune response activation through the cGAS-STING pathway.
Target Subcellular Location
Nucleus. Nucleus, nucleolus. Chromosome.
Target Protein Families
Ku80 family
Target Research Area
Epigenetics and Nuclear Signaling
Target Synonyms
86 kDa subunit of Ku antigen; ATP dependent DNA helicase 2 subunit 2; ATP dependent DNA helicase II 80 kDa subunit; ATP dependent DNA helicase II 86 Kd subunit; ATP dependent DNA helicase II; ATP-dependent DNA helicase 2 subunit 2; ATP-dependent DNA helicase II 80 kDa subunit; CTC box binding factor 85 kDa; CTC box-binding factor 85 kDa subunit; CTC85; CTCBF; DNA repair protein XRCC5; KARP 1; KARP1; Ku 80; Ku autoantigen 80kDa; Ku80; Ku86; Ku86 autoantigen related protein 1; KUB 2; KUB2; Lupus Ku autoantigen protein p86; NFIV; Nuclear factor IV; Thyroid lupus autoantigen; Thyroid-lupus autoantigen; TLAA; X ray repair complementing defective repair in Chinese hamster cells 5 (double strand break rejoining); X-ray repair complementing defective repair in Chinese hamster cells 5 (double-strand-break rejoining); X-ray repair cross-complementing protein 5; Xray repair complementing defective repair in Chinese hamster cells 5; XRCC 5; XRCC5; XRCC5_HUMAN
Target Background
The protein encoded by this gene is the 80-kilodalton subunit of the Ku heterodimer protein which is also known as ATP-dependant DNA helicase II or DNA repair protein XRCC5. Ku is the DNA-binding component of the DNA-dependent protein kinase, and it functions together with the DNA ligase IV-XRCC4 complex in the repair of DNA double-strand break by non-homologous end joining and the completion of V(D)J recombination events. This gene functionally complements Chinese hamster xrs-6, a mutant defective in DNA double-strand break repair and in ability to undergo V(D)J recombination. A rare microsatellite polymorphism in this gene is associated with cancer in patients of varying radiosensitivity.
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