Homeobox protein Hox-D13 is a protein that in humans is encoded by the HOXD13 gene. [5] [6] [7] This gene belongs to the homeobox family of genes. The homeobox genes encode a highly conserved family of transcription factors that play an important role in morphogenesis in all multicellular organisms.
Mammals possess four similar homeobox gene clusters, HOXA, HOXB, HOXC and HOXD, located on different chromosomes, consisting of 9–11 genes arranged in tandem. HOXD13 is the first of several HOXD genes located in a cluster on chromosome 2. Deletions that remove the entire HOXD gene cluster or the 5' end of this cluster have been associated with severe limb and genital abnormalities. The product of the mouse Hoxd13 gene plays a role in axial skeleton development and forelimb morphogenesis. [8]
Changes in the expression of the Hoxd13 gene in early lobe-finned fish may have also contributed to the evolution of the tetrapod limb. [9] Experiments investigating the impact of 5′ Hoxd overexpression in zebrafish embryos observed modified development of distal fin structures, resulting in increased proliferation, distal expansion of cartilage tissue and fin fold reduction. [10] A number of similar studies conducted with a range of animals, including catsharks [11] and marsupials, [12] lend further credibility to the role of the Hoxd13 gene in the fin-to-limb transition.
Mutations in HOXD13 can cause several types of autosomal dominant syndactyly and brachydactyly, including brachydactyly type D ("club thumb"), brachydactyly type E, syndactyly type 5 and synpolydactyly type 1. [13]
Homeobox protein Hox-A1 is a protein that in humans is encoded by the HOXA1 gene.
Homeobox D10, also known as HOXD10, is a protein which in humans is encoded by the HOXD10 gene.
Homeobox protein Hox-A11 is a protein that in humans is encoded by the HOXA11 gene.
Homeobox protein Hox-B5 is a protein that in humans is encoded by the HOXB5 gene.
Homeobox protein Hox-A13 is a protein that in humans is encoded by the HOXA13 gene.
Homeobox protein Hox-B1 is a protein that in humans is encoded by the HOXB1 gene.
Homeobox protein Hox-D3 is a protein that in humans is encoded by the HOXD3 gene.
Homeobox protein Hox-D9 is a protein that in humans is encoded by the HOXD9 gene.
Homeobox protein Hox-C6 is a protein that in humans is encoded by the HOXC6 gene. Hox-C6 expression is highest in the fallopian tube and ovary. HoxC6 has been highly expressed in many types of cancers including prostate, breast, and esophageal squamous cell cancer.
Homeobox protein Hox-A3 is a protein that in humans is encoded by the HOXA3 gene.
Homeobox protein Hox-D4 is a protein that in humans is encoded by the HOXD4 gene.
Homeobox protein Hox-D11 is a protein that in humans is encoded by the HOXD11 gene.
Homeobox protein Hox-C13 is a protein that in humans is encoded by the HOXC13 gene.
Homeobox protein Hox-D12 is a protein that in humans is encoded by the HOXD12 gene.
Homeobox protein Hox-C9 is a protein that in humans is encoded by the HOXC9 gene.
Homeobox protein Hox-D1 is a protein that in humans is encoded by the HOXD1 gene.
Homeobox protein Hox-C5 is a protein that in humans is encoded by the HOXC5 gene.
Homeobox protein Hox-D8 is a protein that in humans is encoded by the HOXD8 gene.
Homeobox protein Hox-C11 is a protein that in humans is encoded by the HOXC11 gene.
Homeobox C12 is a protein that in humans is encoded by the HOXC12 gene.
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: CS1 maint: DOI inactive as of August 2024 (link)This article incorporates text from the United States National Library of Medicine, which is in the public domain.