GPA33 glycoprotein A33 [Homo sapiens (human)] - Gene

Summary

Official Symbol: GPA33provided by HGNC
Official Full Name: glycoprotein A33provided by HGNC
Primary source: HGNC:HGNC:4445
See related: Ensembl:ENSG00000143167 MIM:602171; AllianceGenome:HGNC:4445
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: A33
Summary: The glycoprotein encoded by this gene is a cell surface antigen that is expressed in greater than 95% of human colon cancers. The open reading frame encodes a 319-amino acid polypeptide having a putative secretory signal sequence and 3 potential glycosylation sites. The predicted mature protein has a 213-amino acid extracellular region, a single transmembrane domain, and a 62-amino acid intracellular tail. The sequence of the extracellular region contains 2 domains characteristic of the CD2 subgroup of the immunoglobulin (Ig) superfamily. [provided by RefSeq, Jul 2008]
Expression: Biased expression in colon (RPKM 108.1), duodenum (RPKM 69.2) and 2 other tissues See more
Orthologs: mouse all
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Genomic context

Location:: 1q24.1

Exon count:: 9

Annotation release	Status	Assembly	Chr	Location
RS_2024_08	current	GRCh38.p14 (GCF_000001405.40)	1	NC_000001.11 (167052836..167090377, complement)
RS_2024_08	current	T2T-CHM13v2.0 (GCF_009914755.1)	1	NC_060925.1 (166398672..166437547, complement)
RS_2024_09	previous assembly	GRCh37.p13 (GCF_000001405.25)	1	NC_000001.10 (167022073..167059614, complement)

Chromosome 1 - NC_000001.11 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

A panel of intestinal differentiation markers (CDX2, GPA33, and LI-cadherin) identifies gastric cancer patients with favourable prognosis.
Title: A panel of intestinal differentiation markers (CDX2, GPA33, and LI-cadherin) identifies gastric cancer patients with favourable prognosis.
A33 shows similar sensitivity to but is more specific than CDX2 as an immunomarker of colorectal carcinoma
Title: A33 shows similar sensitivity to but is more specific than CDX2 as an immunomarker of colorectal carcinoma.
A33 expression is directly correlated to colorectal tumor differentiation.
Title: Heterogeneous expression of A33 in colorectal cancer: possible explanation for A33 antibody treatment failure.
Data indicate that EpCAM- and A33-Exos were released from the apical and basolateral surfaces, respectively.
Title: Two distinct populations of exosomes are released from LIM1863 colon carcinoma cell-derived organoids.
Data indicate positive staining was observed for both A33 expression and KRN330 binding from patients biopsied on Day 8, 9 or 14 following initial dosing of 3 mg/kg.
Title: Safety, pharmacokinetics and pharmacodynamics of the anti-A33 fully-human monoclonal antibody, KRN330, in patients with advanced colorectal cancer.
Increased interaction between vaccinia virus proteins A33 and B5 is detrimental to infectious extracellular enveloped virion production.
Title: Increased interaction between vaccinia virus proteins A33 and B5 is detrimental to infectious extracellular enveloped virion production.
The A33-dependent incorporation of B5 into extracellular enveloped vaccinia virions is mediated through an interaction between their lumenal domains.
Title: The A33-dependent incorporation of B5 into extracellular enveloped vaccinia virions is mediated through an interaction between their lumenal domains.
Clinical trial of gene-disease association and gene-environment interaction. (HuGE Navigator)
Title: Personalized smoking cessation: interactions between nicotine dose, dependence and quit-success genotype score.
Observational study of gene-disease association. (HuGE Navigator)
Title: Follow-up of a major linkage peak on chromosome 1 reveals suggestive QTLs associated with essential hypertension: GenNet study.
This work has demonstrated that the antigen is both highly immobile and extremely persistent-retaining its surface localization for a turnover halflife of greater than 2 days.
Title: A33 antigen displays persistent surface expression.

Submit: New GeneRIF Correction See all GeneRIFs (12)

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

EBI GWAS Catalog

Description
Genome wide association study (GWAS) of Chagas cardiomyopathy in Trypanosoma cruzi seropositive subjects. EBI GWAS Catalog EBI GWAS CatalogPubMed

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

HIV-1 interactions

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Replication interactions

Interaction	Pubs
HIV-1 infection (VSV-G pseudotyped) of CEMT4 T cells downregulates plasma membrane expression of GPA33	PubMed
Knockdown of glycoprotein A33, transmembrane (GPA33) by shRNA library screening inhibits HIV-1 replication in cultured Jurkat T-cells	PubMed

Protein interactions

Protein	Gene	Interaction	Pubs
Tat	tat	HIV-1 Tat downregulates the expression of glycoprotein A33 (GPA33) in human primary T cells	PubMed

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Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

SHGC-53101 (e-PCR)
- UniSTS:46908

NoName (e-PCR)
- UniSTS:481386

AL033926 (e-PCR)
- UniSTS:93809

RH103589 (e-PCR)
- UniSTS:97914

NoName (e-PCR)
- UniSTS:481998

Gene Ontology Provided by GOA

Function	Evidence Code	Pubs
enables protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables signaling receptor activity	TAS Traceable Author Statement more info	PubMed

Component	Evidence Code	Pubs
located_in extracellular exosome	HDA more info	PubMed
is_active_in plasma membrane	IBA Inferred from Biological aspect of Ancestor more info

General protein information

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Preferred Names: cell surface A33 antigen

Names: glycoprotein A33 (transmembrane); transmembrane glycoprotein A33

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.