PAXX PAXX non-homologous end joining factor [Homo sapiens (human)] - Gene

Summary

Official Symbol: PAXXprovided by HGNC
Official Full Name: PAXX non-homologous end joining factorprovided by HGNC
Primary source: HGNC:HGNC:27849
See related: Ensembl:ENSG00000148362 MIM:616315; AllianceGenome:HGNC:27849
Gene type: protein coding
RefSeq status: REVIEWED
Organism: Homo sapiens
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as: XLS; C9orf142
Summary: The protein encoded by this gene plays a role in the nonhomologous end joining (NHEJ) pathway of DNA double-strand break repair. The encoded protein may function to stabilize the Ku70/Ku80 heterodimer to facilitate the assembly and maintain the stability of the NHEJ complex. [provided by RefSeq, Jul 2016]
Expression: Ubiquitous expression in spleen (RPKM 25.7), lymph node (RPKM 14.9) and 25 other tissues See more
Orthologs: mouse all
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Genomic context

Location:: 9q34.3

Exon count:: 7

Annotation release	Status	Assembly	Chr	Location
RS_2024_08	current	GRCh38.p14 (GCF_000001405.40)	9	NC_000009.12 (136992422..136993976)
RS_2024_08	current	T2T-CHM13v2.0 (GCF_009914755.1)	9	NC_060933.1 (149226833..149228387)
RS_2024_09	previous assembly	GRCh37.p13 (GCF_000001405.25)	9	NC_000009.11 (139886874..139888428)

Chromosome 9 - NC_000009.12 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Expression

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See details

Project title: HPA RNA-seq normal tissues
Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
BioProject: PRJEB4337
Publication: PMID 24309898
Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

PAXX binding to the NHEJ machinery explains functional redundancy with XLF.
Title: PAXX binding to the NHEJ machinery explains functional redundancy with XLF.
Absence of XRCC4 and its paralogs in human cells reveal differences in outcomes for DNA repair and V(D)J recombination.
Title: Absence of XRCC4 and its paralogs in human cells reveal differences in outcomes for DNA repair and V(D)J recombination.
Synthetic lethality between DNA repair factors Xlf and Paxx is rescued by inactivation of Trp53
Title: Synthetic lethality between DNA repair factors Xlf and Paxx is rescued by inactivation of Trp53.
PAXX, XLF and XRCC4 synergise in the efficient DNA double-strand breaks recruitment, substrate recognition and stimulation of Pol lambda enzymatic activity during nonhomologous end joining DNA repair.
Title: PAXX and its paralogs synergistically direct DNA polymerase λ activity in DNA repair.
PAXX contributes to base excision repair pathway via interaction of polymerase beta. PAXX deficiency causes TMZ sensitivity.
Title: PAXX Participates in Base Excision Repair via Interacting with Pol β and Contributes to TMZ Resistance in Glioma Cells.
Although PAXX-deficient cells lack c-NHEJ phenotypes, PAXX forms a stable ternary complex with Ku bound to DNA. Thus, PAXX plays an accessory role during c-NHEJ that is largely overlapped by XLF's function.
Title: PAXX Is an Accessory c-NHEJ Factor that Associates with Ku70 and Has Overlapping Functions with XLF.
These data identify PAXX as a new Non-homologous end joining factor.
Title: Interactome analysis identifies a new paralogue of XRCC4 in non-homologous end joining DNA repair pathway.
PAXX promotes Ku-dependent DNA ligation in vitro and assembly of core nonhomologous end-joining (NHEJ) factors on damaged chromatin in cells. These findings identify PAXX as a new component of the NHEJ machinery.
Title: DNA repair. PAXX, a paralog of XRCC4 and XLF, interacts with Ku to promote DNA double-strand break repair.

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Phenotypes

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Find tests for this gene in the NIH Genetic Testing Registry (GTR)

Review eQTL and phenotype association data in this region using PheGenI

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

WI-19910 (e-PCR)
- UniSTS:81703

STS-T23618 (e-PCR)
- UniSTS:79582

Gene Ontology Provided by GOA

Function	Evidence Code	Pubs
enables DNA polymerase binding	IPI Inferred from Physical Interaction more info	PubMed
enables identical protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables molecular adaptor activity	IBA Inferred from Biological aspect of Ancestor more info
enables molecular adaptor activity	IDA Inferred from Direct Assay more info	PubMed
enables protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables protein homodimerization activity	IDA Inferred from Direct Assay more info	PubMed

Process	Evidence Code	Pubs
involved_in DNA damage response	IDA Inferred from Direct Assay more info	PubMed
involved_in double-strand break repair via nonhomologous end joining	IBA Inferred from Biological aspect of Ancestor more info
involved_in double-strand break repair via nonhomologous end joining	IDA Inferred from Direct Assay more info	PubMed
involved_in double-strand break repair via nonhomologous end joining	IMP Inferred from Mutant Phenotype more info	PubMed

Component	Evidence Code	Pubs
part_of Ku70:Ku80 complex	IDA Inferred from Direct Assay more info	PubMed
located_in cytoplasm	IEA Inferred from Electronic Annotation more info
part_of nonhomologous end joining complex	IBA Inferred from Biological aspect of Ancestor more info
part_of nonhomologous end joining complex	IDA Inferred from Direct Assay more info	PubMed
located_in nucleoplasm	IDA Inferred from Direct Assay more info
is_active_in nucleus	IBA Inferred from Biological aspect of Ancestor more info
located_in nucleus	IDA Inferred from Direct Assay more info	PubMed
is_active_in site of double-strand break	IBA Inferred from Biological aspect of Ancestor more info
located_in site of double-strand break	IDA Inferred from Direct Assay more info	PubMed

General protein information

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Preferred Names: protein PAXX

Names: XRCC4-like small protein; paralog of XRCC4 and XLF

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

mRNA and Protein(s)

NM_001329678.2 → NP_001316607.1 protein PAXX isoform 1

Status: REVIEWED

Description

Transcript Variant: This variant (1) encodes the longer isoform (1).

Source sequence(s)

AL807752
NM_183241.3 → NP_899064.1 protein PAXX isoform 2

See identical proteins and their annotated locations for NP_899064.1

Status: REVIEWED

Source sequence(s)

BC002613

Consensus CDS

CCDS7020.1

UniProtKB/Swiss-Prot

Q8IY19, Q9BUH6

Related

ENSP00000360682.3, ENST00000371620.4

Conserved Domains (1) summary

pfam15384
Location:8 → 204

PAXX; PAXX, PAralog of XRCC4 and XLF, also called C9orf142