Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-5 (GNG5)
The protein contains 68 amino acids for an estimated molecular weight of 7318 Da.
Guanine nucleotide-binding proteins (G proteins) are involved as a modulator or transducer in various transmembrane signaling systems. The beta and gamma chains are required for the GTPase activity, for replacement of GDP by GTP, and for G protein-effector interaction. (updated: April 1, 2015)
Protein identification was indicated in the following studies:
- Goodman and co-workers. (2013) The proteomics and interactomics of human erythrocytes. Exp Biol Med (Maywood) 238(5), 509-518.
- Lange and co-workers. (2014) Annotating N termini for the human proteome project: N termini and Nα-acetylation status differentiate stable cleaved protein species from degradation remnants in the human erythrocyte proteome. J Proteome Res. 13(4), 2028-2044.
- Hegedűs and co-workers. (2015) Inconsistencies in the red blood cell membrane proteome analysis: generation of a database for research and diagnostic applications. Database (Oxford) 1-8.
- Wilson and co-workers. (2016) Comparison of the Proteome of Adult and Cord Erythroid Cells, and Changes in the Proteome Following Reticulocyte Maturation. Mol Cell Proteomics. 15(6), 1938-1946.
- Bryk and co-workers. (2017) Quantitative Analysis of Human Red Blood Cell Proteome. J Proteome Res. 16(8), 2752-2761.
- D'Alessandro and co-workers. (2017) Red blood cell proteomics update: is there more to discover? Blood Transfus. 15(2), 182-187.
- Chu and co-workers. (2018) Quantitative mass spectrometry of human reticulocytes reveal proteome-wide modifications during maturation. Br J Haematol. 180(1), 118-133.
Methods
The following articles were analysed to gather the proteome content of erythrocytes.
The gene or protein list provided in the studies were processed using the ID mapping API of Uniprot in September 2018. The number of proteins identified and mapped without ambiguity in these studies is indicated below.
Only Swiss-Prot entries (reviewed) were considered for protein evidence assignation.
| Publication | Identification 1 | Uniprot mapping 2 | Not mapped / Obsolete | TrEMBL | Swiss-Prot |
|---|---|---|---|---|---|
| Goodman (2013) | 2289 (gene list) | 2278 | 53 | 20599 | 2269 |
| Lange (2014) | 1234 | 1234 | 7 | 28 | 1224 |
| Hegedus (2015) | 2638 | 2622 | 0 | 235 | 2387 |
| Wilson (2016) | 1658 | 1528 | 170 | 291 | 1068 |
| d'Alessandro (2017) | 1826 | 1817 | 2 | 0 | 1815 |
| Bryk (2017) | 2090 | 2060 | 10 | 108 | 1942 |
| Chu (2018) | 1853 | 1804 | 55 | 362 | 1387 |
1 as available in the article and/or in supplementary material
2 uniprot mapping returns all protein isoforms as one entry
The compilation of older studies can be retrieved from the Red Blood Cell Collection database.
The data and differentiation stages presented below come from the proteomic study and analysis performed by our partners of the GReX consortium, more details are available in their published work.
This protein is annotated as membranous in Gene Ontology, is annotated as membranous in UniProt.
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Biological Process
Cellular response to glucagon stimulus
Chemical synaptic transmission
Energy reserve metabolic process
G protein-coupled receptor signaling pathway
Positive regulation of neural precursor cell proliferation
Positive regulation of secondary heart field cardioblast proliferation
Signal transduction
Small molecule metabolic process
The reference OMIM entry for this protein is 600874
Guanine nucleotide-binding protein, gamma-5; gng5
G protein gamma-5 subunit
DESCRIPTION
G proteins are trimeric (alpha-beta-gamma) membrane-associated proteins that regulate flow of information from cell surface receptors to a variety of internal metabolic effectors. Interaction of a G protein with its activated receptor promotes exchange of GTP for GDP that is bound to the alpha subunit. The alpha-GTP complex dissociates from the beta-gamma heterodimer so that the subunits, in turn, may interact with and regulate effector molecules (Gilman, 1987; summary by Ahmad et al., 1995).CLONING
Fisher and Aronson (1992) characterized the cDNA and genomic sequence of the gamma-5 subunit (GNG5). They found, furthermore, a cDNA clone from human placenta with an altered open reading frame and 3-prime untranslated region. At base position 957 of the cDNA for native chitobiase (CTBS; 600873), which would be the 3-prime end of exon 6 of the chitobiase gene, there was fused in-frame a sequence that represented exons 2 and 3 from the gamma-5 gene. Exons 2 and 3, respectively, code for the carboxyl-end of the gamma-5 protein and the 3-prime untranslated portion of its mRNA. This hybrid message was also identified in human liver and retina by RT-PCR analysis. It was not known whether a hybrid protein was produced in vivo.MAPPING
Ahmad et al. (1995) demonstrated that both the CTBS gene and the GNG5 gene map to 1p by PCR analysis of somatic cell hybrids; by fluorescence in situ hybridization using a YAC clone that contains both chitobiase and gamma-5 genes, they refined the localization to 1p22. ... More on the omim web site
Feb. 2, 2018: Protein entry updated
Automatic update: Uniprot description updated
Dec. 19, 2017: Protein entry updated
Automatic update: Uniprot description updated
Nov. 23, 2017: Protein entry updated
Automatic update: Uniprot description updated
March 16, 2016: Protein entry updated
Automatic update: OMIM entry 600874 was added.