1hgc
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HIGH RESOLUTION CRYSTAL STRUCTURES AND COMPARISONS OF T STATE DEOXYHAEMOGLOBIN AND TWO LIGANDED T-STATE HAEMOGLOBINS: T(ALPHA-OXY)HAEMOGLOBIN AND T(MET)HAEMOGLOBIN
OverviewOverview
The origin of co-operativity in haemoglobin (Hb) resides in the reduced, affinity of the T-state. T-state Hb crystals grown from polyethyleneglycol, can be liganded without the molecule switching to the R high affinity, state. X-ray analysis of T-state alpha-oxy Hb and T-state met Hb has, identified the structural basis for reduced affinity. The nature of the, chemical tension at the haem environment is different in the alpha and, beta haems. There are small but definite structural changes associated, with ligation in the T-state: these prove to be mostly in the same, direction as the larger changes that occur in the T-->R transition.
DiseaseDisease
Known diseases associated with this structure: Erythremias, alpha- OMIM:[141800], Erythremias, beta- OMIM:[141900], Erythrocytosis OMIM:[141850], HPFH, deletion type OMIM:[141900], Heinz body anemia OMIM:[141850], Heinz body anemias, alpha- OMIM:[141800], Heinz body anemias, beta- OMIM:[141900], Hemoglobin H disease OMIM:[141850], Hypochromic microcytic anemia OMIM:[141850], Methemoglobinemias, alpha- OMIM:[141800], Methemoglobinemias, beta- OMIM:[141900], Sickle cell anemia OMIM:[141900], Thalassemia, alpha- OMIM:[141850], Thalassemia-beta, dominant inclusion-body OMIM:[141900], Thalassemias, alpha- OMIM:[141800], Thalassemias, beta- OMIM:[141900]
About this StructureAbout this Structure
1HGC is a Protein complex structure of sequences from Homo sapiens with and as ligands. Full crystallographic information is available from OCA.
ReferenceReference
High resolution crystal structures and comparisons of T-state deoxyhaemoglobin and two liganded T-state haemoglobins: T(alpha-oxy)haemoglobin and T(met)haemoglobin., Liddington R, Derewenda Z, Dodson E, Hubbard R, Dodson G, J Mol Biol. 1992 Nov 20;228(2):551-79. PMID:1453464
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