1tno | pdb_00001tno

Rat Protein Geranylgeranyltransferase Type-I Complexed with a GGPP analog and a KKKSKTKCVIM Peptide Derived from K-Ras4B

spinqualitylabelsall models 1tno, resolution 2.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1tno is a 18 chain structure with sequence from Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL, MES, MGM, ZN Related: 1n4p, 1n4q, 1qbq, 1d8d, 1tn6, 1tn7, 1tn8, 1tnb, 1tnu, 1tny, 1tnz Gene: FNTA (Rattus norvegicus), PGGT1B (Rattus norvegicus) Activity: Protein geranylgeranyltransferase type I, with EC number 2.5.1.59 Resources: FirstGlance, OCA, RCSB, PDBsum 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 Post-translational modifications are essential for the proper function of many proteins in the cell. The attachment of an isoprenoid lipid (a process termed prenylation) by protein farnesyltransferase (FTase) or geranylgeranyltransferase type I (GGTase-I) is essential for the function of many signal transduction proteins involved in growth, differentiation, and oncogenesis. FTase and GGTase-I (also called the CaaX prenyltransferases) recognize protein substrates with a C-terminal tetrapeptide recognition motif called the Ca1a2X box. These enzymes possess distinct but overlapping protein substrate specificity that is determined primarily by the sequence identity of the Ca1a2X motif. To determine how the identity of the Ca1a2X motif residues and sequence upstream of this motif affect substrate binding, we have solved crystal structures of FTase and GGTase-I complexed with a total of eight cognate and cross-reactive substrate peptides, including those derived from the C termini of the oncoproteins K-Ras4B, H-Ras and TC21. These structures suggest that all peptide substrates adopt a common binding mode in the FTase and GGTase-I active site. Unexpectedly, while the X residue of the Ca1a2X motif binds in the same location for all GGTase-I substrates, the X residue of FTase substrates can bind in one of two different sites. Together, these structures outline a series of rules that govern substrate peptide selectivity; these rules were utilized to classify known protein substrates of CaaX prenyltransferases and to generate a list of hypothetical substrates within the human genome. Crystallographic analysis of CaaX prenyltransferases complexed with substrates defines rules of protein substrate selectivity.,Reid TS, Terry KL, Casey PJ, Beese LS J Mol Biol. 2004 Oct 15;343(2):417-33. PMID:15451670 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Geranylgeranyl transferase

Proteopedia Page Contributors and Editors (what is this?)

OCA