3VRG: The Crystal Structure Of Hemoglobin From Woolly Mammoth In The Met Form

Citation:
Abstract
The haemoglobin (Hb) of the extinct woolly mammoth has been recreated using recombinant genes expressed in Escherichia coli. The globin gene sequences were previously determined using DNA recovered from frozen cadavers. Although highly similar to the Hb of existing elephants, the woolly mammoth protein shows rather different responses to chloride ions and temperature. In particular, the heat of oxygenation is found to be much lower in mammoth Hb, which appears to be an adaptation to the harsh high-latitude climates of the Pleistocene Ice Ages and has been linked to heightened sensitivity of the mammoth protein to protons, chloride ions and organic phosphates relative to that of Asian elephants. To elucidate the structural basis for the altered homotropic and heterotropic effects, the crystal structures of mammoth Hb have been determined in the deoxy, carbonmonoxy and aquo-met forms. These models, which are the first structures of Hb from an extinct species, show many features reminiscent of human Hb, but underline how the delicate control of oxygen affinity relies on much more than simple overall quaternary-structure changes.
PDB ID: 3VRGDownload
MMDB ID: 104732
PDB Deposition Date: 2012/4/9
Updated in MMDB: 2012/11
Experimental Method:
x-ray diffraction
Resolution: 1.5  Å
Source Organism:
Similar Structures:
Biological Unit for 3VRG: tetrameric; determined by author and by software (PISA)
Molecular Components in 3VRG
Label Count Molecule
Proteins (4 molecules)
2
Hemoglobin Subunit Alpha
Molecule annotation
2
Hemoglobin Subunit Beta/delta Hybrid
Molecule annotation
Chemicals (8 molecules)
1
4
2
4
* Click molecule labels to explore molecular sequence information.

Citing MMDB
.