UniProt:P68871 HBB

chain
  • initiator methionine:1
  • chain:2-147
  • peptide:33-42
  • peptide:33-39
checksum A31F6D621C6556A1
comment
  • FUNCTION Involved in oxygen transport from the lung to the various peripheral tissues.FUNCTION LVV-hemorphin-7 potentiates the activity of bradykinin, causing a decrease in blood pressure.FUNCTION Functions as an endogenous inhibitor of enkephalin-degrading enzymes such as DPP3, and as a selective antagonist of the P2RX3 receptor which is involved in pain signaling, these properties implicate it as a regulator of pain and inflammation.SUBUNIT Heterotetramer of two alpha chains and two beta chains in adult hemoglobin A (HbA). Heterotetramer of two zeta chains and two beta chains in hemoglobin Portland-2, detected in fetuses and neonates with homozygous alpha-thalassemia.INTERACTION Red blood cells.PTM Glucose reacts non-enzymatically with the N-terminus of the beta chain to form a stable ketoamine linkage. This takes place slowly and continuously throughout the 120-day life span of the red blood cell. The rate of glycation is increased in patients with diabetes mellitus.PTM S-nitrosylated; a nitric oxide group is first bound to Fe(2+) and then transferred to Cys-94 to allow capture of O(2).PTM Acetylated on Lys-60, Lys-83 and Lys-145 upon aspirin exposure.MASS SPECTROMETRY Genetic variations in HBB are involved in resistance to malaria [MIM:611162]. Hemoglobin S (Hb S), which at homozygosity is responsible for sickle cell anemia, is not associated with any clinical abnormality when heterozygous. At heterozygosity, Hb S confers an increase in protection from life-threatening malaria. Additional variants conferring resistance against severe malaria are hemoglobin C (Hb C) and hemoglobin E (Hb E).DISEASE The disease may be caused by variants affecting the gene represented in this entry.DISEASE The disease is caused by variants affecting the gene represented in this entry.DISEASE The disease is caused by variants affecting the gene represented in this entry.DISEASE The disease is caused by variants affecting the gene represented in this entry.MISCELLANEOUS One molecule of 2,3-bisphosphoglycerate can bind to two beta chains per hemoglobin tetramer.SIMILARITY Belongs to the globin family.CAUTION The modification form of Leu-142 is subject of controversy and could be the artifactual result of sample handling.CAUTION It is unclear if hemoglobin Beckman (Hb Beckman) is defined by p.Ala136Glu or p.Ala136Asp. Hb Beckman has been originally identified by reverse phase-HPLC and tandem mass spectrometry, and has been reported as variant p.Ala136Glu (Ref.140). Subsequently, variant p.Ala136Asp has been reported based on HBB gene complete sequencing results (PubMed:19453576). Variant p.Ala136Asp has also been detected by mass spectrometry (PubMed:26209877). Although the name Hb Beckman is currently used for variant p.Ala136Asp, it cannot be ruled out that Hb Beckman is indeed variant p.Ala136Glu (PubMed:19453576).ONLINE INFORMATION Human hemoglobin variants and thalassemiasONLINE INFORMATION Hemoglobin entry
created [InstanceEdit:217385] Schmidt, EE, 2008-03-27 06:23:53
crossReference
databaseName UniProt
dbId 231538
description
  • recommendedName: Hemoglobin subunit beta alternativeName: Beta-globin alternativeName: Hemoglobin beta chain component recommendedName: LVV-hemorphin-7 /component component recommendedName: Spinorphin /component
displayName UniProt:P68871 HBB
geneName
  • HBB
identifier P68871
isSequenceChanged false
keyword
  • 3D-structure
  • Acetylation
  • Congenital dyserythropoietic anemia
  • Direct protein sequencing
  • Disease variant
  • Glycation
  • Glycoprotein
  • Heme
  • Hereditary hemolytic anemia
  • Hypotensive agent
  • Iron
  • Metal-binding
  • Oxygen transport
  • Phosphoprotein
  • Proteomics identification
  • Pyruvate
  • Reference proteome
  • S-nitrosylation
  • Transport
  • Vasoactive
modified [InstanceEdit:9963647] Weiser, Joel, 2025-08-15
moleculeType Protein
name
  • HBB
otherIdentifier
  • 11715347_s_at
  • 11715348_x_at
  • 11753712_x_at
  • 1562981_PM_at
  • 1562981_at
  • 16734840
  • 209116_PM_x_at
  • 209116_x_at
  • 211696_PM_x_at
  • 211696_x_at
  • 217232_PM_x_at
  • 217232_x_at
  • 3043
  • 31687_f_at
  • 32052_at
  • 3360402
  • 3360403
  • 3360404
  • 3360405
  • 3360406
  • 3360407
  • 3360408
  • 3360409
  • 3360410
  • 3360411
  • 3360412
  • 3360413
  • 3360414
  • 3360422
  • 7946033
  • A_23_P203558
  • A_33_P3289150
  • GE61327
  • GO:0003013
  • GO:0003014
  • GO:0004601
  • GO:0005344
  • GO:0005515
  • GO:0005576
  • GO:0005615
  • GO:0005829
  • GO:0005833
  • GO:0006954
  • GO:0008217
  • GO:0015670
  • GO:0015671
  • GO:0016491
  • GO:0019825
  • GO:0020037
  • GO:0030185
  • GO:0030492
  • GO:0031720
  • GO:0031721
  • GO:0031838
  • GO:0042542
  • GO:0042744
  • GO:0045429
  • GO:0046872
  • GO:0048821
  • GO:0048856
  • GO:0070062
  • GO:0070293
  • GO:0070527
  • GO:0071682
  • GO:0072562
  • GO:0097746
  • GO:0098754
  • GO:0098869
  • GO:0140104
  • GO:1904724
  • GO:1904813
  • HMNXSV003004371
  • HMNXSV003017647
  • Hs.155376.1.A1_3p_s_at
  • ILMN_2100437
  • M25079_s_at
  • PH_hs_0029250
  • PH_hs_0031887
  • TC11001330.hg
  • TC11003023.hg
  • U01317_cds6_at
  • g13549111_3p_at
  • g179408_3p_s_at
physicalEntity
referenceDatabase [ReferenceDatabase:2] UniProt
referenceGene
referenceTranscript
schemaClass ReferenceGeneProduct
secondaryIdentifier
  • HBB_HUMAN
  • A4GX73
  • B2ZUE0
  • P02023
  • Q13852
  • Q14481
  • Q14510
  • Q45KT0
  • Q549N7
  • Q6FI08
  • Q6R7N2
  • Q8IZI1
  • Q9BX96
  • Q9UCD6
  • Q9UCP8
  • Q9UCP9
sequenceLength 147
species [Species:48887] Homo sapiens
stId uniprot:P68871
url http://purl.uniprot.org/uniprot/P68871

Referrals

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