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Homeobox genes encode homeodomain protein products that are transcription factors sharing a characteristic protein fold structure that binds DNA to regulate expression of target genes. [ 3 ] [ 4 ] [ 2 ] Homeodomain proteins regulate gene expression and cell differentiation during early embryonic development, thus mutations in homeobox genes can ...
The homeodomain is a 60-amino-acid-long DNA-binding domain (encoded by its corresponding 180-base-pair DNA sequence, the homeobox). This amino acid sequence folds into a "helix-turn-helix" (i.e. homeodomain fold) motif that is stabilized by a third helix.
Homeodomain proteins are transcription factors that share a DNA-binding domain called the homeodomain. [1] Changes in the expression and function of homeotic genes are responsible for the changes in the morphology of the limbs of arthropods as well as in the axial skeletons of vertebrates.
Thus, the 60 amino acid DNA binding protein domain was named the homeodomain, while the 180 bp nucleotide sequence encoding it was named the homeobox. The homeobox gene clusters studied by Ed Lewis were named the Hox genes, although many more homeobox genes are encoded by animal genomes than those in the Hox gene clusters.
Homeotic selector gene complexes in the fruit fly Drosophila melanogaster. One of the most commonly studied model organisms in regards to homeotic genes is the fruit fly Drosophila melanogaster. Its homeotic Hox genes occur in either the Antennapedia complex (ANT-C) or the Bithorax complex (BX-C) discovered by Edward B. Lewis. [10]
15394 Ensembl ENSG00000105991 ENSMUSG00000029844 UniProt P49639 P09022 RefSeq (mRNA) NM_153620 NM_005522 NM_010449 NM_001311118 RefSeq (protein) NP_005513 NP_705873 n/a Location (UCSC) Chr 7: 27.09 – 27.1 Mb Chr 6: 52.13 – 52.14 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Homeobox protein Hox-A1 is a protein that in humans is encoded by the HOXA1 gene. Gene Two transcript ...
This gene and other HOXB genes form a gene cluster on chromosome 17 in the 17q21.32 region. [6] Men who inherit a rare (<0.1% in a selected group of patients without clinical signs of prostate cancer ) genetic variant in HOXB13 (G84E or rs138213197) have a 10-20-fold increased risk of prostate cancer.
The Hox genes contain the 183-bp homeobox, which encodes a particular portion of the Hox proteins called the homeodomain. The homeodomain can then bind to other portions of DNA to regulate gene expression. These genes determine the basic structure and orientation of an organism after the embryonic segments have formed. [1]