PMID- 23799303 OWN - NLM STAT- MEDLINE DCOM- 20131108 LR - 20191210 IS - 1520-6025 (Electronic) IS - 0163-3864 (Linking) VI - 76 IP - 7 DP - 2013 Jul 26 TI - Gombamide A, a cyclic thiopeptide from the sponge Clathria gombawuiensis. PG - 1380-3 LID - 10.1021/np4003367 [doi] AB - A new peptide, gombamide A (1), was isolated from the marine sponge Clathria gombawuiensis, collected from Korean waters. On the basis of the results of combined spectroscopic analyses, the structure of this compound was determined to be a cyclic C-terminally modified thiohexapeptide containing the unusual amino acid residues para-hydroxystyrylamide (pHSA) and pyroglutamic acid (pyroGlu). The absolute configurations of all amino acid residues were determined to be l by advanced Marfey's analysis. The new compound exhibited weak cytotoxicity against A549 and K562 cell lines as well as moderate inhibitory activity against Na(+)/K(+)-ATPase. FAU - Woo, Jung-Kyun AU - Woo JK AD - Natural Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea. FAU - Jeon, Ju-eun AU - Jeon JE FAU - Kim, Chang-Kwon AU - Kim CK FAU - Sim, Chung J AU - Sim CJ FAU - Oh, Dong-Chan AU - Oh DC FAU - Oh, Ki-Bong AU - Oh KB FAU - Shin, Jongheon AU - Shin J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130625 PL - United States TA - J Nat Prod JT - Journal of natural products JID - 7906882 RN - 0 (Antineoplastic Agents) RN - 0 (Peptides, Cyclic) RN - 0 (gombamide A) RN - EC 7.2.2.13 (Sodium-Potassium-Exchanging ATPase) SB - IM MH - Animals MH - Antineoplastic Agents/chemistry/*isolation & purification/pharmacology MH - Drug Screening Assays, Antitumor MH - Humans MH - Marine Biology MH - Molecular Structure MH - Nuclear Magnetic Resonance, Biomolecular MH - Peptides, Cyclic/chemistry/*isolation & purification/pharmacology MH - Porifera/*chemistry MH - Republic of Korea MH - Sodium-Potassium-Exchanging ATPase/antagonists & inhibitors EDAT- 2013/06/27 06:00 MHDA- 2013/11/10 06:00 CRDT- 2013/06/27 06:00 PHST- 2013/06/27 06:00 [entrez] PHST- 2013/06/27 06:00 [pubmed] PHST- 2013/11/10 06:00 [medline] AID - 10.1021/np4003367 [doi] PST - ppublish SO - J Nat Prod. 2013 Jul 26;76(7):1380-3. doi: 10.1021/np4003367. Epub 2013 Jun 25.