CKLF like MARVEL transmembrane domain containing 7

Last updated
CMTM7
Identifiers
Aliases CMTM7 , CKLFSF7, CKLF like MARVEL transmembrane domain containing 7
External IDs OMIM: 607890; MGI: 2447166; HomoloGene: 15882; GeneCards: CMTM7; OMA:CMTM7 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_138410
NM_181472

NM_001252479
NM_133978

RefSeq (protein)

NP_612419
NP_852137

NP_001239408
NP_598739

Location (UCSC) Chr 3: 32.39 – 32.48 Mb Chr 9: 114.59 – 114.61 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

CKLF like MARVEL transmembrane domain-containing 7 (i.e. CMTM7), previously termed chemokine-like factor superfamily 7 (i.e. CKLFSF7), is a protein that in humans is encoded by the CMTM7 gene. This gene, which is located in band 22 on the short (i.e. "p") arm of chromosome 3, and the protein that it encodes belong to the CKLF-like MARVEL transmembrane domain-containing family. Through the process of alternative splicing, the CMTM7 gene encodes two isoforms, CMTM7-v1 and CMTM7-v2, with CMTM7-v1 being the main form expressed and studied. CMTM7 proteins are widely expressed in normal human tissues. [5] [6]

Contents

Function

CMTM7 protein levels are low in the malignant tissues of various cancers such as those of esophagus, stomach, pancreas, liver, lung, cervix, [5] and breast. [7] as compared with its expression in the normal tissues of these organs. [5] [7] Furthermore, the forced overexpression of CMTM7 protein in various cancer immortalized cell lines inhibit their proliferation and motility in culture as well as their ability to form tumors in a nude mouse experimental model of cancer. [8] These findings suggest that the CMTM7 protein acts to inhibit the development and/or progression of these cancers and therefore that the CMTM7 gene acts as tumor suppressor in these cancers. [5] However, further studies are needed to support these suggestion and determine if expression of the CMTM7 can be used as a clinical marker of these cancers severity/prognosis and/or as therapeutic targets for treating them. [5] [9]

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<span class="mw-page-title-main">CMTM2</span> Protein-coding gene in the species Homo sapiens

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CKLF-like MARVEL transmembrane domain-containing protein 3, also termed chemokine-like factor superfamily 3, is a member of the CKLF-like MARVEL transmembrane domain-containing family of proteins. In humans, CMTM2 protein is encoded by the CMTM3 gene located in band 22.1 on the long arm of chromosome 16. This protein is expressed in a wide range of tissues, including fetal tissues. It is highly expressed in the male reproductive system, particularly testicular tissues and may play a role in the development of this tissue. It is also highly expressed in the immune system including circulating blood cells, i.e. B lymphocytes, CD4+ T lymphocytes, and monocytes. However, CMTM3 protein is weakly expressed or unexpressed in the malignant tissues of several types of cancers. In many but not all of theses cancers, this decreased or lack of expression appears due to methylation of the GpC islands in the promoter region, and thereby the silencing, of the CMTM3 gene.

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The CKLF-like MARVEL transmembrane domain-containing family (CMTM), previously termed the chemokine-like factor superfamily (CKLFSF), consists of 9 proteins, some of which have various isoforms due to alternative splicing of their respective genes. These proteins along with their isoforms are:

CKLF-like MARVEL transmembrane domain-containing 5 (CMTM5), previously termed chemokine-like factor superfamily 5, designates any one of the six protein isoforms encoded by six different alternative splices of its gene, CMTM5; CMTM5-v1 is the most studied of these isoforms. The CMTM5 gene is located in band 11.2 on the long arm of chromosome 14.

CKLF like MARVEL transmembrane domain-containing 8, previously termed chemokine-like factor superfamily 8 has at least two isoforms, the CMTM8 and CMTM8-v2 proteins. Protein isoforms are variant products that are made by the alternative splicing of a single gene. The gene for these isoforms, CMTM8, is located in band 22 on the short arm of chromosome 3. The CMTM8 gene and its CMTM8 and CMTM8-v2 proteins belong to the CKLF-like MARVEL transmembrane domain-containing family of structurally and functionally related genes and proteins. The CMTM8 protein is the full-length and predominant product of the CMTM8 gene. This protein is expressed in a wide range of normal adult and fetal tissues while relatively little is known about the CMTM8-v2 protein. Studies suggest that the CMTM8 protein may be involved in the development of various cancers.

CKLF like MARVEL transmembrane domain-containing 1, formerly termed chemokine-like factor superfamily 1, has 23 known isoforms, the CMTM1-v1 to CMTM1-v23 proteins. Protein isoforms are variant products that are made by alternative splicing of a single gene. The gene for these isoforms, CMTM1, is located in band 22 on the long arm of chromosome 16. The CMTM1 gene and its 23 isoforms belong to the CKLF-like MARVEL transmembrane domain-containing family of structurally and functionally related genes and proteins. CMTM1 proteins are weakly express in a wide range of normal tissues but are far more highly expressed in normal testes as well as the malignant cells of certain types of cancer.

CKLF like MARVEL transmembrane domain-containing 4, formerly termed chemokine-like factor superfamily 4, is a small transmembrane protein which passes the plasma membrane four times. It has 3 known isoforms, the CMTM4-v1 to CMTM4-v3 proteins. Protein isoforms are variant products that are made by alternative splicing of a single gene. The gene for the CMTM4 isoforms is located in band 22 on the long arm of chromosome 16. The CMTM4 gene and its 3 isoform proteins belong to the CKLF-like MARVEL transmembrane domain-containing family of structurally and functionally related genes and proteins. CMTM4-v1 and CMTM4-v2 are widely expressed in multiple human tissue while CMTM4-v3 has been detected only in the kidney and placental tissues.

References

  1. 1 2 3 GRCh38: Ensembl release 89: ENSG00000153551 Ensembl, May 2017
  2. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000032436 Ensembl, May 2017
  3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. 1 2 3 4 5 Wu J, Li L, Wu S, Xu B (August 2020). "CMTM family proteins 1-8: roles in cancer biological processes and potential clinical value". Cancer Biology & Medicine. 17 (3): 528–542. doi:10.20892/j.issn.2095-3941.2020.0032. PMC   7476098 . PMID   32944388.
  6. "Entrez Gene: CKLF like MARVEL transmembrane domain-containing 7" . Retrieved 2016-03-09.
  7. 1 2 Wu J (2020). "CMTM5/7 are biomarkers and prognostic factors in human breast carcinoma". Cancer Biomarkers. 29 (1): 89–99. doi:10.3233/CBM-191226. PMID   32568178. S2CID   219973219.
  8. Li H, Li J, Su Y, Fan Y, Guo X, Li L, Su X, Rong R, Ying J, Mo X, Liu K, Zhang Z, Yang F, Jiang G, Wang J, Zhang Y, Ma D, Tao Q, Han W (June 2014). "A novel 3p22.3 gene CMTM7 represses oncogenic EGFR signaling and inhibits cancer cell growth". Oncogene. 33 (24): 3109–18. doi: 10.1038/onc.2013.282 . PMID   23893243. S2CID   11023199.
  9. Li M, Luo F, Tian X, Yin S, Zhou L, Zheng S (2020). "Chemokine-Like Factor-Like MARVEL Transmembrane Domain-Containing Family in Hepatocellular Carcinoma: Latest Advances". Frontiers in Oncology. 10: 595973. doi: 10.3389/fonc.2020.595973 . PMC   7691587 . PMID   33282744.

Further reading

This article incorporates text from the United States National Library of Medicine, which is in the public domain.