PMID- 10467092 OWN - NLM STAT- MEDLINE DCOM- 19990921 LR - 20211203 IS - 1072-8368 (Print) IS - 1072-8368 (Linking) VI - 6 IP - 9 DP - 1999 Sep TI - A novel target recognition revealed by calmodulin in complex with Ca2+-calmodulin-dependent kinase kinase. PG - 819-24 AB - The structure of calcium-bound calmodulin (Ca2+/CaM) complexed with a 26-residue peptide, corresponding to the CaM-binding domain of rat Ca2+/CaM-dependent protein kinase kinase (CaMKK), has been determined by NMR spectroscopy. In this complex, the CaMKK peptide forms a fold comprising an alpha-helix and a hairpin-like loop whose C-terminus folds back on itself. The binding orientation of this CaMKK peptide by the two CaM domains is opposite to that observed in all other CaM-target complexes determined so far. The N- and C-terminal hydrophobic pockets of Ca2+/CaM anchor Trp 444 and Phe 459 of the CaMKK peptide, respectively. This 14-residue separation between two key hydrophobic groups is also unique among previously determined CaM complexes. The present structure represents a new and distinct class of Ca2+/CaM target recognition that may be shared by other Ca2+/CaM-stimulated proteins. FAU - Osawa, M AU - Osawa M AD - Molecular Chemistry Research, Chemistry Laboratories, Institute for Drug Discovery Research, Yamanouchi Pharmaceutical Co., Ltd., Tsukuba 305-8585, Japan. FAU - Tokumitsu, H AU - Tokumitsu H FAU - Swindells, M B AU - Swindells MB FAU - Kurihara, H AU - Kurihara H FAU - Orita, M AU - Orita M FAU - Shibanuma, T AU - Shibanuma T FAU - Furuya, T AU - Furuya T FAU - Ikura, M AU - Ikura M LA - eng SI - PDB/1CKK PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Nat Struct Biol JT - Nature structural biology JID - 9421566 RN - 0 (Calmodulin) RN - 0 (Peptide Fragments) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) RN - EC 2.7.11.17 (Calcium-Calmodulin-Dependent Protein Kinase Kinase) SB - IM MH - Amino Acid Sequence MH - Amino Acid Substitution MH - Animals MH - Binding Sites MH - COS Cells MH - Calcium-Calmodulin-Dependent Protein Kinase Kinase MH - Calmodulin/*chemistry/genetics/*metabolism MH - Models, Molecular MH - Molecular Sequence Data MH - Mutation MH - Nuclear Magnetic Resonance, Biomolecular MH - Peptide Fragments/chemistry/metabolism MH - Protein Binding MH - Protein Conformation MH - Protein Serine-Threonine Kinases/*chemistry/genetics/*metabolism MH - Protein Structure, Secondary MH - Rats MH - Sequence Alignment MH - Transfection EDAT- 1999/08/31 09:00 MHDA- 2001/03/23 10:01 CRDT- 1999/08/31 09:00 PHST- 1999/08/31 09:00 [pubmed] PHST- 2001/03/23 10:01 [medline] PHST- 1999/08/31 09:00 [entrez] AID - 10.1038/12271 [doi] PST - ppublish SO - Nat Struct Biol. 1999 Sep;6(9):819-24. doi: 10.1038/12271.