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Target intelligence / Profile preview
Hemoglobin subunit epsilon 1 (HBE1)
- Target
- HBE1
- Molecular classification
- Globin family, Hemoglobin subunit, Beta-like globin chain
01
Overview
Hemoglobin subunit epsilon 1 (HBE1) encodes the epsilon chain—a beta-like globin chain that is expressed exclusively during early mammalian embryonic development in the yolk sac. The protein forms part of embryonic hemoglobin types (Hb Gower I and Hb Gower II), combining with zeta or alpha-globin chains for early oxygen transport before the fetal and adult hemoglobins (HBG, HBB, HBD) predominate. The gene belongs to the beta-globin gene cluster located on chromosome 11 (11p15.5), alongside gamma, delta, and beta globin genes; its expression is tightly developmentally regulated and silenced after the embryonic period. Mutations in HBE1 are rare and not associated with major adult disease phenotypes; some rare hemoglobinopathies (e.g., thalassemias) may mention variant embryonic globin expression, but this is of limited clinical significance.
- Other names
- Hemoglobin subunit epsilonHBE1HBEepsilon-globinhemoglobin epsilon chainepsilon globinEpsilon-globinhemoglobin, epsilon 1
02
Mechanism of action
Not applicable; there are no drugs known to target this subunit specifically
03
Biological functions
Oxygen transport (in embryonic blood)Iron ion binding
04
Disease associations
Autosomal dominant beta thalassemiaHemoglobin E diseaseOther rare embryonic hemoglobinopathies (very limited clinical relevance)
05
Safety considerations
None reported; in adults, the gene is silent, so it is not associated with toxicity or off-target effects
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