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Homeodomain proteins function as transcription factors due to the DNA binding properties of the conserved HTH motif. Homeodomain proteins are considered to be master control genes, meaning that a single protein can regulate expression of many target genes.
The protein encoded by this gene is a homeodomain protein that lacks certain conserved residues required for DNA binding. It was reported that choriocarcinoma cell lines and tissues failed to express this gene, which suggested the possible involvement of this gene in malignant conversion of placental trophoblasts.
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.
Homeodomain-interacting protein kinase 2 is an enzyme that in humans is encoded by the HIPK2 gene. [5] HIPK2 can be categorized as a Serine/Threonine Protein kinase, specifically one that interacts with homeodomain transcription factors. [6] It belongs to a family of protein kinases known as the DYRK kinases. [7]
The same Hox protein can act as a repressor at one gene and an activator at another. The ability of Hox proteins to bind DNA is conferred by a part of the protein referred to as the homeodomain. The homeodomain is a 60-amino-acid-long DNA-binding domain (encoded by its corresponding 180-base-pair DNA sequence, the homeobox
engrailed is a homeodomain transcription factor [1] involved in many aspects of multicellular development. First known for its role in arthropod embryological development, working in consort with the Hox genes, engrailed has been found to be important in other areas of development.
Paired-like homeodomain transcription factor 2 also known as pituitary homeobox 2 is a protein that in humans is encoded by the PITX2 gene. [ 5 ] [ 6 ] [ 7 ] Function
Oct-4 (octamer-binding transcription factor 4), also known as POU5F1 (POU domain, class 5, transcription factor 1), is a protein that in humans is encoded by the POU5F1 gene. [5] Oct-4 is a homeodomain transcription factor of the POU family. It is critically involved in the self-renewal of undifferentiated embryonic stem cells. [6]