Hemoglobin beta-globin gene locus (HBB locus)

The **hemoglobin beta-globin gene locus** refers to a linear cluster of genes found on human chromosome 11, encoding the beta-like globin chains that are part of hemoglobin, the protein responsible for transporting oxygen in red blood cells[1][4]. This locus includes the embryonic (ε), fetal (Gγ and Aγ), and adult (δ and β) globin genes, each expressed at different stages of development according to tightly regulated mechanisms involving a locus control region (LCR) upstream from the cluster[1][3][5]. Genetic mutations or deletions within this locus underlie many hemoglobinopathies, such as beta-thalassemia and sickle cell disease[4][8]. The locus is critical for normal erythropoiesis and balancing the synthesis of alpha- and beta-globin chains required to form functional hemoglobin[4]. While individual hemoglobin subunits (such as the β chain) are direct therapeutic targets, the entire gene locus is a genomic region and not a classic molecular target like a receptor, enzyme, or transporter[1][3][4].

Other names

beta-globin gene clusterβ-globin locushuman β-globin gene cluster