Limb region 1 protein homolog is a protein that in humans is encoded by the LMBR1gene.[1][2][3]
This gene encodes a member of the LMBR1-like membrane protein family. Another member of this protein family has been shown to be a lipocalin transmembrane receptor. A highly conserved, cis-acting regulatory module for the sonic hedgehog (protein) gene is located within an intron of this gene. Consequently, disruption of this genic region can alter sonic hedgehog expression and affect limb patterning, but it is not known if this gene functions directly in limb development. Mutations and chromosomal deletions and rearrangements in this genic region are associated with acheiropody and preaxial polydactyly, which likely result from altered sonic hedgehog expression.[3]
References
↑Heus HC, Hing A, van Baren MJ, Joosse M, Breedveld GJ, Wang JC, Burgess A, Donnis-Keller H, Berglund C, Zguricas J, Scherer SW, Rommens JM, Oostra BA, Heutink P (Aug 1999). "A physical and transcriptional map of the preaxial polydactyly locus on chromosome 7q36". Genomics. 57 (3): 342–51. doi:10.1006/geno.1999.5796. PMID10329000.
Clark RM, Marker PC, Kingsley DM (2001). "A novel candidate gene for mouse and human preaxial polydactyly with altered expression in limbs of Hemimelic extra-toes mutant mice". Genomics. 67 (1): 19–27. doi:10.1006/geno.2000.6225. PMID10945466.
Horikoshi T, Endo N, Shibata M, et al. (2003). "Disruption of the C7orf2/Lmbr1 genic region is associated with preaxial polydactyly in humans and mice". J. Bone Miner. Metab. 21 (1): 1–4. doi:10.1007/s007740300000. PMID12491086.
Lettice LA, Heaney SJ, Purdie LA, et al. (2003). "A long-range Shh enhancer regulates expression in the developing limb and fin and is associated with preaxial polydactyly". Hum. Mol. Genet. 12 (14): 1725–35. doi:10.1093/hmg/ddg180. PMID12837695.
Hillier LW, Fulton RS, Fulton LA, et al. (2003). "The DNA sequence of human chromosome 7". Nature. 424 (6945): 157–64. doi:10.1038/nature01782. PMID12853948.
Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID14702039.
Sagai T, Masuya H, Tamura M, et al. (2004). "Phylogenetic conservation of a limb-specific, cis-acting regulator of Sonic hedgehog ( Shh)". Mamm. Genome. 15 (1): 23–34. doi:10.1007/s00335-033-2317-5. PMID14727139.
