1kl9 is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Eukaryotic translation initiation factor 2alpha (eIF2alpha) is a member of the eIF2 heterotrimeric complex that binds and delivers Met-tRNA(i)(Met) to the 40 S ribosomal subunit in a GTP-dependent manner. Phosphorylation/dephosphorylation of eIF2alpha at Ser-51 is the major regulator of protein synthesis in eukaryotic cells. Here, we report the first structural analysis on eIF2, the three-dimensional structure of a 22-kDa N-terminal portion of human eIF2alpha by x-ray diffraction at 1.9 A resolution. This structure contains two major domains. The N terminus is a beta-barrel with five antiparallel beta-strands in an oligonucleotide binding domain (OB domain) fold. The phosphorylation site (Ser-51) is on the loop connecting beta3 and beta4 in the OB domain. A helical domain follows the OB domain, and the first helix has extensive interactions, including a disulfide bridge, to fix its orientation with respect to the OB domain. The two domains meet along a negatively charged groove with highly conserved residues, indicating a likely site for protein-protein interaction.
Crystal structure of the N-terminal segment of human eukaryotic translation initiation factor 2alpha.,Nonato MC, Widom J, Clardy J J Biol Chem. 2002 May 10;277(19):17057-61. Epub 2002 Feb 21. PMID:11859078[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
↑ Nonato MC, Widom J, Clardy J. Crystal structure of the N-terminal segment of human eukaryotic translation initiation factor 2alpha. J Biol Chem. 2002 May 10;277(19):17057-61. Epub 2002 Feb 21. PMID:11859078 doi:http://dx.doi.org/10.1074/jbc.M111804200
