1hac
From Proteopedia
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| , resolution 2.60Å | |||||||
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| Ligands: | , , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CROSSLINKED HAEMOGLOBIN
Overview
Hemoglobin has been a long-standing paradigm for understanding protein allostery. Here, the x-ray structures of two chemically crosslinked, fully liganded hemoglobins, alpha2beta82CA82beta and alpha2beta82ND82beta, are described at 2.3 A and 2.6 A resolution, respectively. Strikingly, these crosslinked hemoglobins assume intermediate conformations that lie between those of R and the controversial liganded hemoglobin state R2 rather than between R and T. Thus, these structures support only a T left and right arrow R left and right arrow R2 allosteric pathway and underscore the physiological importance of the R2 conformation.
About this Structure
1HAC is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Allosteric intermediates indicate R2 is the liganded hemoglobin end state., Schumacher MA, Zheleznova EE, Poundstone KS, Kluger R, Jones RT, Brennan RG, Proc Natl Acad Sci U S A. 1997 Jul 22;94(15):7841-4. PMID:9223274
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