4h2y | pdb_00004h2y

Crystal structure of engineered Bradyrhizobium japonicum glycine:[carrier protein] ligase complexed with carrier protein from Agrobacterium tumefaciens and ATP

spinqualitylabelsall models 4h2y, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4h2y is a 4 chain structure with sequence from Agrfc and Bradu. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ATP, MG, PNS, ZN Related: 3mf2, 4h2s, 4h2t, 4h2u, 4h2v, 4h2w, 4h2x Gene: Atu2573,AGR_C_4663 (BRADU), AGR_C_4658, Atu2571 (AGRFC) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [AACL1_BRAJA] Catalyzes the ATP-dependent activation of L-glycine and its transfer to the phosphopantetheine prosthetic group covalently attached to the vicinal carrier protein bsr0959 of yet unknown function. May participate in nonribosomal peptide synthesis or related processes. L-alanine is a poor substrate whereas L-serine or D-amino acids are not substrates for ATP-dependent activation. Does not display tRNA aminoacylation activity. [AACP_AGRT5] Aminoacyl carrier protein. Can be charged with L-alanine, L-glycine or L-serine, via the formation of a thioester bond between the amino acid and the 4'-phosphopantetheinyl prosthetic group, catalyzed by the Atu2573 ligase. Publication Abstract from PubMed Amino acid:[carrier protein] ligases (aa:CP ligases) are recently discovered enzymes that are highly similar to class II aminoacyl-tRNA synthetases (aaRSs). However, while aaRSs aminoacylate tRNA and supply building blocks for ribosomal translation, aa:CP ligases transfer activated amino acids to the phosphopantetheine group of small carrier proteins. We have solved the crystal structure of an aa:CP ligase complexed with the carrier protein (CP). The CP prosthetic group enters the active site from a different direction than tRNA in class II aaRS complexes through an idiosyncratic tunnel. CP binds to aa:CP ligase in a fundamentally different manner compared to tRNA binding by structurally closely related aaRSs. Based on crystallographic analysis, an enzyme of altered CP specificity was designed, and the mechanism of amino acid transfer to the prosthetic group was proposed. The presented study reveals how a conserved class II aaRS catalytic core can adapt to another function through minor structural alterations. Adaptation of Aminoacyl-tRNA Synthetase Catalytic Core to Carrier Protein Aminoacylation.,Mocibob M, Ivic N, Luic M, Weygand-Durasevic I Structure. 2013 Mar 26. pii: S0969-2126(13)00058-0. doi:, 10.1016/j.str.2013.02.017. PMID:23541895 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Proteopedia Page Contributors and Editors (what is this?)

OCA