PMID- 23442790 OWN - NLM STAT- MEDLINE DCOM- 20140106 LR - 20211021 IS - 1660-3397 (Electronic) IS - 1660-3397 (Linking) VI - 11 IP - 3 DP - 2013 Feb 26 TI - Thalassospiramide G, a new gamma-amino-acid-bearing peptide from the marine bacterium Thalassospira sp. PG - 611-22 LID - 10.3390/md11030611 [doi] AB - In the chemical investigation of marine unicellular bacteria, a new peptide, thalassospiramide G (1), along with thalassospiramides A and D (2-3), was discovered from a large culture of Thalassospira sp. The structure of thalassospiramide G, bearing gamma-amino acids, such as 4-amino-5-hydroxy-penta-2-enoic acid (AHPEA), 4-amino-3,5-dihydroxy-pentanoic acid (ADPA), and unique 2-amino-1-(1H-indol-3-yl) ethanone (AIEN), was determined via extensive spectroscopic analysis. The absolute configuration of thalassospiramide D (3), including 4-amino-3-hydroxy-5-phenylpentanoic acid (AHPPA), was rigorously determined by 1H-1H coupling constant analysis and chemical derivatization. Thalassospiramides A and D (2-3) inhibited nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated mouse macrophage RAW 264.7 cells, with IC(50) values of 16.4 and 4.8 muM, respectively. FAU - Um, Soohyun AU - Um S AD - Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 151-742, Korea. dongchanoh@snu.ac.kr FAU - Pyee, Yuna AU - Pyee Y FAU - Kim, Eun-Hee AU - Kim EH FAU - Lee, Sang Kook AU - Lee SK FAU - Shin, Jongheon AU - Shin J FAU - Oh, Dong-Chan AU - Oh DC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130226 PL - Switzerland TA - Mar Drugs JT - Marine drugs JID - 101213729 RN - 0 (Lipopolysaccharides) RN - 0 (Peptides) RN - 0 (Peptides, Cyclic) RN - 0 (thalassospiramide A) RN - 0 (thalassospiramide B) RN - 31C4KY9ESH (Nitric Oxide) SB - IM MH - Animals MH - Cell Line MH - Inhibitory Concentration 50 MH - Lipopolysaccharides/pharmacology MH - Macrophages/*drug effects/metabolism MH - Mice MH - Nitric Oxide/biosynthesis MH - Peptides/chemistry/isolation & purification/*pharmacology MH - Peptides, Cyclic/administration & dosage/isolation & purification/*pharmacology MH - Rhodospirillaceae/*chemistry MH - Spectrum Analysis PMC - PMC3705361 EDAT- 2013/02/28 06:00 MHDA- 2014/01/07 06:00 PMCR- 2013/03/01 CRDT- 2013/02/28 06:00 PHST- 2012/12/13 00:00 [received] PHST- 2013/01/29 00:00 [revised] PHST- 2013/02/06 00:00 [accepted] PHST- 2013/02/28 06:00 [entrez] PHST- 2013/02/28 06:00 [pubmed] PHST- 2014/01/07 06:00 [medline] PHST- 2013/03/01 00:00 [pmc-release] AID - md11030611 [pii] AID - marinedrugs-11-00611 [pii] AID - 10.3390/md11030611 [doi] PST - epublish SO - Mar Drugs. 2013 Feb 26;11(3):611-22. doi: 10.3390/md11030611.