Aliases for HBA-LCR Gene
External Ids for HBA-LCR Gene
- Entrez Gene: 106144573
This genomic region regulates developmental stage- and erythroid lineage-specific expression of the HBZ (hemoglobin, zeta), HBA2 (hemoglobin, alpha 2), HBA1 (hemoglobin, alpha 1) and HBQ1 (hemoglobin, theta 1) genes within the alpha-globin gene cluster. This region has properties of a locus control region (LCR) in that it can confer high-level and chromosomal position-independent expression on members of the alpha-globin gene cluster in a transgene assay, but unlike other LCRs, such as that regulating the beta-globin gene cluster, it lacks the ability to confer copy number-dependent expression on the linked genes. This region overlaps the NPRL3 (NPR3-like, GATOR1 complex subunit) gene, which is transcribed in the opposite orientation compared to the downstream alpha-globin genes. This regulatory region is characterized by multiple erythroid-specific DNase I hypersensitive sites, including HS-48, HS-40, HS-33, HS-10 and HS-8, where the HS-40 site represents an enhancer and is the major cis-acting regulatory element. HS-40 binds transcription factors and mediates looping with the promoters of the alpha-globin genes during erythroid development. The HS-40 element has also been used to enhance erythroid expression of beta-globin family members in gene therapy vectors for beta-chain hemoglobinopathies. Mutations in this regulatory region result in alpha thalassemias and alpha hemoglobinopathies. [provided by RefSeq, Aug 2015]
GeneCards Summary for HBA-LCR Gene
HBA-LCR (Alpha-Globin Locus Control Region) is a Biological Region gene.