C12orf40

C12orf40, also known as Chromosome 12 Open Reading Frame 40, HEL-206, and Epididymis Luminal Protein 206[1] is a protein that in humans is encoded by the C12orf40 gene.[2]

Gene
Evolution of the C12orf40 gene (and its more conserved sub-region of the first 4 exons) across several taxa. Information available from NCBI BLAST software.

Human gene

In humans, the gene for C12orf40 is located on chromosome 12. There are 13 exons in the highest quality isoform,[3] forming an mRNA of 2797 base pairs.[4] Three other isoforms have been isolated.[2]

Evolution

Homologs exist as distant as the green sea turtle and chickens at approximately 60% sequence identity, suggesting that the gene may have arisen in the amniotes after their divergence from other tetrapods;[5] the first 4 exons are conserved with 36% identity as distantly as the anemone.

Protein

Properties

The human C12orf40 protein is 652 amino acids in length.[6] Its molecular weight is predicted to be 74.52 kDa,[7] and its isoelectric point 7.822.[8] Amino acids 229-652 contain a domain of unknown function (DUF4552) which is conserved in vertebrates.[6] C12orf40 is predicted to be a soluble protein with no transmembrane segments.[9] Its secondary and tertiary structures are not currently known.

Interactions

Experimental evidence shows that C12orf40 has a physical interaction with dynein light chain 2 (DYNLL2).[10] This protein is part of a complex that regulates the function of the motor protein dynein.

Expression

Within the cell, C12orf40 is predicted to be present in the nucleus based on signals within its sequence.[11] An analysis of normal human tissues shows that C12orf40 expression occurs primarily in the testis,[12] suggesting importance to the male reproductive system.

Clinical significance

The function of C12orf40 is not yet well understood. However, the three prime untranslated region (3' UTR) of C12orf40 is highly similar to the 3' UTR of the cystic fibrosis transmembrane conductance regulator (CFTR), which may mean that the two genes share certain expression patterns.[13] In the fibroblasts of hypertrophic scars, exposure to the immunosuppressant Tacrolimus causes C12orf40 up-regulation.[14] In pigs, a region homologous to human C12orf40 plays a role in arthrogryposis, a disease characterized by congenital fibrosis.[15] The common thread of these studies suggests that C12orf40 may have a connection to the formation of healthy connective tissue.

References
  1. GeneCards
  3. UCSC Genome Bioinformatics Basic Local Alignment Tool
  4. NCBI Nucleotide
  5. NCBI Basic Local Alignment Search Tool
  6. NCBI Protein
  7. Stothard, P. Protein Molecular Weight
  8. Toldo, L. EMBL WWW Gateway to Isoelectric Point Service
  9. Hirokawa, T.; Boon-Chieng, S.; Mitaku, S. (1 May 1998). "SOSUI: classification and secondary structure prediction system for membrane proteins". Bioinformatics. 14 (4): 378–379. doi:10.1093/bioinformatics/14.4.378. PMID 9632836.
  10. Rolland, Thomas; Taşan, Murat; Charloteaux, Benoit; Pevzner, Samuel J.; Zhong, Quan; Sahni, Nidhi; Yi, Song; Lemmens, Irma; Fontanillo, Celia; Mosca, Roberto; Kamburov, Atanas; Ghiassian, Susan D.; Yang, Xinping; Ghamsari, Lila; Balcha, Dawit; Begg, Bridget E.; Braun, Pascal; Brehme, Marc; Broly, Martin P.; Carvunis, Anne-Ruxandra; Convery-Zupan, Dan; Corominas, Roser; Coulombe-Huntington, Jasmin; Dann, Elizabeth; Dreze, Matija; Dricot, Amélie; Fan, Changyu; Franzosa, Eric; Gebreab, Fana; Gutierrez, Bryan J.; Hardy, Madeleine F.; Jin, Mike; Kang, Shuli; Kiros, Ruth; Lin, Guan Ning; Luck, Katja; MacWilliams, Andrew; Menche, Jörg; Murray, Ryan R.; Palagi, Alexandre; Poulin, Matthew M.; Rambout, Xavier; Rasla, John; Reichert, Patrick; Romero, Viviana; Ruyssinck, Elien; Sahalie, Julie M.; Scholz, Annemarie; Shah, Akash A.; Sharma, Amitabh; Shen, Yun; Spirohn, Kerstin; Tam, Stanley; Tejeda, Alexander O.; Trigg, Shelly A.; Twizere, Jean-Claude; Vega, Kerwin; Walsh, Jennifer; Cusick, Michael E.; Xia, Yu; Barabási, Albert-László; Iakoucheva, Lilia M.; Aloy, Patrick; De Las Rivas, Javier; Tavernier, Jan; Calderwood, Michael A.; Hill, David E.; Hao, Tong; Roth, Frederick P.; Vidal, Marc (November 2014). "A Proteome-Scale Map of the Human Interactome Network". Cell. 159 (5): 1212–1226. doi:10.1016/j.cell.2014.10.050. PMC 4266588. PMID 25416956.
  11. Kenta Nakai, Human Genome Center, Institute for Medical Science, University of Tokyo, Japan.
  12. Edgar, R. (1 January 2002). "Gene Expression Omnibus: NCBI gene expression and hybridization array data repository". Nucleic Acids Research. 30 (1): 207–210. doi:10.1093/nar/30.1.207. PMC 99122. PMID 11752295.
  13. Spence, Jean (July 2009). "Pathway prediction by bioinformatic analysis of the untranslated regions of the CFTR mRNA". Genomics. 94 (1): 39–47. doi:10.1016/j.ygeno.2009.03.002. PMID 19306924.
  14. Wong, Victor W.; You, Fanglei; Januszyk, Michael; Kuang, Anna A. (September 2013). "Tacrolimus fails to regulate collagen expression in dermal fibroblasts". Journal of Surgical Research. 184 (1): 678–690. doi:10.1016/j.jss.2013.04.006. PMID 23647800.
  15. Haubitz, Monika; Neuenschwander, Stefan; Vögeli, Peter (December 2012). "Porcine arthrogryposis multiplex congenita (AMC): New diagnostic test and narrowed candidate region". Molecular and Cellular Probes. 26 (6): 248–252. doi:10.1016/j.mcp.2012.02.005. PMID 22405934.
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