4kvm | pdb_00004kvm

The NatA (Naa10p/Naa15p) amino-terminal acetyltransferase complex bound to a bisubstrate analog

spinqualitylabelsall models 4kvm, resolution 2.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4kvm is a 12 chain structure with sequence from Fission yeast. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: 1XE, CL, SO4 Related: 4kvo, 4kvx Gene: nat1, SPCC338.07c (Fission yeast), ard1, SPAC15E1.08 (Fission yeast) Activity: N-terminal amino-acid N(alpha)-acetyltransferase NatA, with EC number 2.3.1.255 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [NAT1_SCHPO] Non-catalytic component of the NatA N-terminal acetyltransferase, which catalyzes acetylation of proteins beginning with Met-Ser, Met-Gly and Met-Ala. N-acetylation plays a role in normal eukaryotic translation and processing, protect against proteolytic degradation and protein turnover. nat1 anchors ard1 and nat5 to the ribosome and may present the N termini of nascent polypeptides for acetylation (By similarity). [ARD1_SCHPO] Catalytic component of the NatA N-terminal acetyltransferase, which catalyzes acetylation of proteins beginning with Met-Ser, Met-Gly and Met-Ala. N-acetylation plays a role in normal eukaryotic translation and processing, protect against proteolytic degradation and protein turnover (By similarity). Publication Abstract from PubMed N-terminal acetylation is ubiquitous among eukaryotic proteins and controls a myriad of biological processes. Of the N-terminal acetyltransferases (NATs) that facilitate this cotranslational modification, the heterodimeric NatA complex has the most diversity for substrate selection and modifies the majority of all N-terminally acetylated proteins. Here, we report the X-ray crystal structure of the 100-kDa holo-NatA complex from Schizosaccharomyces pombe, in the absence and presence of a bisubstrate peptide-CoA-conjugate inhibitor, as well as the structure of the uncomplexed Naa10p catalytic subunit. The NatA-Naa15p auxiliary subunit contains 13 tetratricopeptide motifs and adopts a ring-like topology that wraps around the NatA-Naa10p subunit, an interaction that alters the Naa10p active site for substrate-specific acetylation. These studies have implications for understanding the mechanistic details of other NAT complexes and how regulatory subunits modulate the activity of the broader family of protein acetyltransferases. Molecular basis for N-terminal acetylation by the heterodimeric NatA complex.,Liszczak G, Goldberg JM, Foyn H, Petersson EJ, Arnesen T, Marmorstein R Nat Struct Mol Biol. 2013 Aug 4. doi: 10.1038/nsmb.2636. PMID:23912279 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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