Globin (globin superfamily)

Globin refers to a **superfamily of heme-containing globular proteins** found in many organisms, notable for binding and/or transporting oxygen through a structure called the "globin fold". Key molecular members include hemoglobin, myoglobin, neuroglobin, and cytoglobin, which share a characteristic eight-helix secondary structure and play critical roles in gas transport and metabolism. The globin superfamily is not a single molecule or direct drug target, but rather includes several clinically and physiologically relevant proteins, particularly hemoglobin (responsible for oxygen transport in blood) and myoglobin (oxygen storage in muscle). Notably, the term "globin" is often used in reference to these subunits, but drug targets and disease associations are almost always specific to a particular globin family member (e.g., "hemoglobin beta chain"). **Is_correct:** - "Globin" is *not* a specific molecule or canonical drug target; it is a protein superfamily containing many functionally distinct members[1][3]. - For therapeutic research, biomarker discovery, or drug interaction purposes, specifying a particular type (such as "hemoglobin beta chain," "myoglobin," or "neuroglobin") is necessary[2][3][4]. - Therefore, this entry is best classified as "is_incorrect: true" for a drug/therapeutic target—too broad and unspecific to be directly actionable. **Key notes:** - The main human drug target and disease biomarker related to the globin superfamily is *hemoglobin* (and its subunit chains), not "globin" generically[1][2][5][7]. - Mutations or dysregulation of globin subunits, especially hemoglobin chains, cause significant diseases (sickle cell disease, thalassemias), but drugs are developed for the specific molecular species, not the family level. - No approved drugs target "globin" as a class, but instead interact with well-defined members (e.g., voxelotor for hemoglobin S in sickle cell disease). **Summary of subfamily:** The *globin* superfamily includes: - Hemoglobin, alpha (HBA) - Hemoglobin, beta (HBB) - Myoglobin - Neuroglobin (NGB) - Cytoglobin (CYGB) and related proteins[1][3][4]. The specific properties, therapeutic relevance, and clinical implications depend on the chosen member of the globin superfamily. For structured database purposes, it is advisable to map entries to specific molecules such as "hemoglobin beta chain" or "myoglobin" rather than the broad superfamily "globin"[1][4].

Other names

Heme-containing globular proteinGlobin superfamily