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RCHY1 (ring finger and CHY zinc finger domain containing 1)

Written2006-03Wenrui Duan, Miguel A. Villalona-Calero
Comprehensive Cancer Center, 1230 JCHRI, 300 West 10th Ave, Columbus, Ohio 43210, USA

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HGNC Alias symbCHIMP
HGNC Alias nameandrogen-receptor N-terminal-interacting protein
 p53-induced protein with a RING-H2 domain
 zinc finger, CHY-type
HGNC Previous nameZNF363
HGNC Previous nameZNF363
LocusID (NCBI) 25898
Atlas_Id 43012
Location 4q21.1  [Link to chromosome band 4q21]
Location_base_pair Starts at 75479037 and ends at 75514430 bp from pter ( according to GRCh38/hg38-Dec_2013)  [Mapping RCHY1.png]
Fusion genes
(updated 2017)
Data from Atlas, Mitelman, Cosmic Fusion, Fusion Cancer, TCGA fusion databases with official HUGO symbols (see references in chromosomal bands)
RCHY1 (4q21.1)::YWHAG (7q11.23)SFXN3 (10q24.31)::RCHY1 (4q21.1)


Description The gene encompasses 32 kb of DNA; 9 exons.
Transcription 4.3 kb nucleotides mRNA. 783 bp open reading frame.


  Immunohistochemical detection of human RCHY1 protein in non-small cell lung cancers. (A) squamous cell carcinoma, and (B) large cell carcinoma.
Description 261 amino acids; 32 kDa protein.
Expression RCHY1 expresses at higher level in liver, testis and heart. Lower expression is detected in lung, brain, muscle and spleen. RCHY1 is overexpressed in non-small cell lung cancers.
Localisation The localization of RCHY1 protein in human lung tumors was evaluated immunohistochemically. RCHY1 protein was found primarily in the cytoplasm and membrane and a small portion in the nucleus of malignant cells.
Function RCHY1 is an ubiquitin-protein E3 ligase that promotes p53 degradation. The RCHY1 gene encodes a RING-H2 domain-containing protein with intrinsic ubiquitin-protein ligase activity. It has been reported that RCHY1( Pirh2) physically interacts with p53 and promotes ubiquitination of p53 independently of Mdm2. RCHY1 was also reported to be transactivated by the p53 product in MEFs, murine proB cell BaF3 and human BJT fibroblasts cells. Therefore, like MDM2, RCHY1 participates in an autoregulatory feedback loop that controls p53 function. Expression of RCHY1 decreased the level of p53 protein, while abrogation of endogenous RCHY1 expression increased the level of p53. Furthermore, RCHY1 represses p53 functions, including p53-dependent transactivation and growth inhibition. RCHY1 is overexpressed in both human and murine lung cancers by comparing Pirh2 mRNA and protein level between lung neoplastic tissues and uninvolved adjacent lung tissue. The increased RCHY1 protein could cause degradation of wild type p53 and reduce the tumor suppression function in tumor cells.
It has been reported that coexpression of RCHY1(ARNIP) and in COS-1 cells reduces the interaction between AR N- and C-terminus. The RING-H2 domain of the RCHY1 functions as an ubiquitin-protein ligase in vitro in the presence of a specific ubiquitin-conjugating enzyme, Ubc4-1. Mutation of a single cysteine residue in the RCHY RING-H2 domain (Cys145Ala) abolished this E3 ubiquitin ligase activity. Fluorescent protein tagging studies revealed that AR-RCHY1 interaction was hormone-independent in COS-1 cells, and suggest that co-localization of both AR and RCHY1to the nucleus upon androgen addition may allow RCHY1 to play a role in nuclear processes.
It has been reported that wild-type RCHY1is an unstable protein with a short half-life and coexpression of TIP60 enhances RCHY1 protein stability and alters RCHY1 subcellular localization. In addition, MVP (measles virus phosphoprotein ) is able to specifically interact with and stabilize the RCHY1 by preventing its ubiquitination. It has been reported that the RCHY1 also interacts with NTKL-BP1 (N-terminal kinase-like protein-binding protein 1) protein
Homology It belongs to the ring finger ubiquitin protein E3 ligase family. Containing Conserved RING-finger Domain (residues 145 - 186 ) and CHY zinc finger (residues 20-94).


Note Unknown

Implicated in

Entity Non-Small Cell Lung Cancer
Disease Lung cancers are pathologically classified as small cell lung cancer and non-small cell lung cancer (non-small cell lung cancer includes large cell carcinomas, squamous cell carcinomas and adenocarcinomas).
Oncogenesis RCHY1 protein is overexpressed in about 84% human lung cancers compared to uninvolved lung tissue. The RCHY1 protein was also elevated in about 93% of murine lung tumors. Because RCHY1 is an ubiquitin-protein ligase that promotes p53 protein degradation, the increased RCHY1 expression could play an important role in lung tumorigenesis.


Cloning and characterization of an androgen receptor N-terminal-interacting protein with ubiquitin-protein ligase activity.
Beitel LK, Elhaji YA, Lumbroso R, Wing SS, Panet-Raymond V, Gottlieb B, Pinsky L, Trifiro MA
Journal of molecular endocrinology. 2002 ; 29 (1) : 41-60.
PMID 12200228
Inhibition of ubiquitination and stabilization of human ubiquitin E3 ligase PIRH2 by measles virus phosphoprotein.
Chen M, Cortay JC, Logan IR, Sapountzi V, Robson CN, Gerlier D
Journal of virology. 2005 ; 79 (18) : 11824-11836.
PMID 16140759
Expression of Pirh2, a newly identified ubiquitin protein ligase, in lung cancer.
Duan W, Gao L, Druhan LJ, Zhu WG, Morrison C, Otterson GA, Villalona-Calero MA
Journal of the National Cancer Institute. 2004 ; 96 (22) : 1718-1721.
PMID 15547185
Pirh2, a p53-induced ubiquitin-protein ligase, promotes p53 degradation.
Leng RP, Lin Y, Ma W, Wu H, Lemmers B, Chung S, Parant JM, Lozano G, Hakem R, Benchimol S
Cell. 2003 ; 112 (6) : 779-791.
PMID 12654245
Control of human PIRH2 protein stability: involvement of TIP60 and the proteosome.
Logan IR, Sapountzi V, Gaughan L, Neal DE, Robson CN
The Journal of biological chemistry. 2004 ; 279 (12) : 11696-11704.
PMID 14701804
A new human gene hNTKL-BP1 interacts with hPirh2.
Zhang L, Li J, Wang C, Ma Y, Huo K
Biochemical and biophysical research communications. 2005 ; 330 (1) : 293-297.
PMID 15781263


This paper should be referenced as such :
Duan, W ; Villalona-Calero, MA
RCHY1 (ring finger, CHY zinc finger domain containing 1)
Atlas Genet Cytogenet Oncol Haematol. 2006;10(3):173-174.
Free journal version : [ pdf ]   [ DOI ]

External links

HGNC (Hugo)RCHY1   17479
Atlas Explorer : (Salamanque)RCHY1
Entrez_Gene (NCBI)RCHY1    ring finger and CHY zinc finger domain containing 1
AliasesARNIP; CHIMP; PIRH2; PRO1996; 
RNF199; ZCHY; ZNF363
GeneCards (Weizmann)RCHY1
Ensembl hg19 (Hinxton)ENSG00000163743 [Gene_View]
Ensembl hg38 (Hinxton)ENSG00000163743 [Gene_View]  ENSG00000163743 [Sequence]  chr4:75479037-75514430 [Contig_View]  RCHY1 [Vega]
ICGC DataPortalENSG00000163743
TCGA cBioPortalRCHY1
Genatlas (Paris)RCHY1
SOURCE (Princeton)RCHY1
Genetics Home Reference (NIH)RCHY1
Genomic and cartography
GoldenPath hg38 (UCSC)RCHY1  -     chr4:75479037-75514430 -  4q21.1   [Description]    (hg38-Dec_2013)
GoldenPath hg19 (UCSC)RCHY1  -     4q21.1   [Description]    (hg19-Feb_2009)
GoldenPathRCHY1 - 4q21.1 [CytoView hg19]  RCHY1 - 4q21.1 [CytoView hg38]
Genome Data Viewer NCBIRCHY1 [Mapview hg19]  
Gene and transcription
Genbank (Entrez)AB209072 AF247041 AF255666 AF305424 AK091501
RefSeq transcript (Entrez)NM_001008925 NM_001009922 NM_001278536 NM_001278537 NM_001278538 NM_001278539 NM_001387136 NM_001387137 NM_015436
Consensus coding sequences : CCDS (NCBI)RCHY1
Gene ExpressionRCHY1 [ NCBI-GEO ]   RCHY1 [ EBI - ARRAY_EXPRESS ]   RCHY1 [ SEEK ]   RCHY1 [ MEM ]
Gene Expression Viewer (FireBrowse)RCHY1 [ Firebrowse - Broad ]
GenevisibleExpression of RCHY1 in : [tissues]  [cell-lines]  [cancer]  [perturbations]  
BioGPS (Tissue expression)25898
GTEX Portal (Tissue expression)RCHY1
Human Protein AtlasENSG00000163743-RCHY1 [pathology]   [cell]   [tissue]
Protein : pattern, domain, 3D structure
Domain families : Pfam (Sanger)
Domain families : Pfam (NCBI)
Conserved Domain (NCBI)RCHY1
Human Protein Atlas [tissue]ENSG00000163743-RCHY1 [tissue]
Protein Interaction databases
Ontologies - Pathways
PubMed83 Pubmed reference(s) in Entrez
GeneRIFsGene References Into Functions (Entrez)
REVIEW articlesautomatic search in PubMed
Last year publicationsautomatic search in PubMed

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indexed on : Wed Jan 19 18:55:40 CET 2022

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