title: Amino acid sequence at the ATP-binding site of cGMP-dependent protein kinase.
abstract: The amino acid sequence at the ATP-binding site on the cGMP-dependent protein kinase has been determined. For this determination the enzyme was labeled covalently by 5'-p-fluorosulfonyl[14C]benzoyladenosine and fragmented using cyanogen bromide or digested by trypsin after succinylation. The 14C-labeled peptides were purified by gel filtration and high performance liquid chromatography. The amino acid sequence around the site was found to be: -Val-Glu-Leu-Val-Gln-Leu-Lys-Ser-Glu-Glu-Ser-Lys-Thr-Phe-Ala-Met-*Lys-Ile-Leu-Lys--Lys-Arg-His-Ile-Val-Asp-Thr-Arg-Gln-Gln-Glu-His-Ile-Arg-Ser-Glu-Lys-, in which *Lys is the lysine residue that was modified by the affinity reagent. When this sequence was compared with that of the ATP-binding site of the catalytic subunit of cAMP-dependent protein kinase, a high degree of structural homology was observed for this site in the two proteins.
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism*; D000595:Amino Acid Sequence; D000818:Animals; D001665:Binding Sites; D002417:Cattle; D006152:Cyclic GMP / Q000494:pharmacology; D008168:Lung / Q000201:enzymology; D010446:Peptide Fragments / Q000032:analysis; D011485:Protein Binding; D011494:Protein Kinases / Q000378:metabolism*; D014357:Trypsin
chemical_list: D010446:Peptide Fragments; D000255:Adenosine Triphosphate; D011494:Protein Kinases; D014357:Trypsin; D006152:Cyclic GMP