3cpm

plant peptide deformylase PDF1B crystal structureplant peptide deformylase PDF1B crystal structure

Structural highlights 3cpm is a 1 chain structure with sequence from Arabidopsis thaliana. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: , Gene: PDF1B (Arabidopsis thaliana) Activity: Peptide deformylase, with EC number 3.5.1.88 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [DEF1B_ARATH] Removes the formyl group from the N-terminal Met of newly synthesized proteins. Has a preferred substrate specificity towards the photosystem II (PS II) D1 polypeptide. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The crystal structure of AtPDF1B [Arabidopsis thaliana PDF (peptide deformylase) 1B; EC 3.5.1.88], a plant specific deformylase, has been determined at a resolution of 2.4 A (1 A=0.1 nm). The overall fold of AtPDF1B is similar to other peptide deformylases that have been reported. Evidence from the crystal structure and gel filtration chromatography indicates that AtPDF1B exists as a symmetric dimer. PDF1B is essential in plants and has a preferred substrate specificity towards the PS II (photosystem II) D1 polypeptide. Comparative analysis of AtPDF1B, AtPDF1A, and the type 1B deformylase from Escherichia coli, identifies a number of differences in substrate binding subsites that might account for variations in sequence preference. A model of the N-terminal five amino acids from the D1 polypeptide bound in the active site of AtPDF1B suggests an influence of Tyr(178) as a structural determinant for polypeptide substrate specificity through hydrogen bonding with Thr(2) in the D1 sequence. Kinetic analyses using a polypeptide mimic of the D1 N-terminus was performed on AtPDF1B mutated at Tyr(178) to alanine, phenylalanine or arginine (equivalent residue in AtPDF1A). The results suggest that, whereas Tyr(178) can influence catalytic activity, other residues contribute to the overall preference for the D1 polypeptide. Insights into the substrate specificity of plant peptide deformylase, an essential enzyme with potential for the development of novel biotechnology applications in agriculture.,Dirk LM, Schmidt JJ, Cai Y, Barnes JC, Hanger KM, Nayak NR, Williams MA, Grossman RB, Houtz RL, Rodgers DW Biochem J. 2008 Aug 1;413(3):417-27. PMID:18412546 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

spinqualitylabelsall models 3cpm, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image