Abstract
SOX genes comprise a family of genes that are related to the mammalian sex determining gene SRY in the region that encodes the HMG-box domain responsible for the sequence-specific DNA-binding activity. SOX genes encode putative transcriptional regulators implicated in the decision of cell fates during development and the control of diverse developmental processes. We have cloned and characterised SOX14, a novel member of the human SOX gene family. Based on the HMG-box sequence, human SOX14 is a member of the B subfamily. SOX14 is expressed in human foetal brain, spinal cord and thymus, and like other members of the B subfamily, it might have a role in regulation of nervous system development. While other members of the B subfamily show similarity outside the HMG-box, the regions flanking the HMG box of the human SOX14 gene are unique. SOX14 has been mapped to human chromosome 3q22→ q23, close to the marker D3S1549. This location places SOX14 within a chromosome interval associated with two distinct syndromes that affect craniofacial development: Blepharophimosis-ptosis-epicantus inversus syndrome and Möbius syndrome.
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