PMID- 23989475 OWN - NLM STAT- MEDLINE DCOM- 20140408 LR - 20130830 IS - 2041-1723 (Electronic) IS - 2041-1723 (Linking) VI - 4 DP - 2013 TI - The first total synthesis of the cyclodepsipeptide pipecolidepsin A. PG - 2352 LID - 10.1038/ncomms3352 [doi] AB - Pipecolidepsin A is a head-to-side-chain cyclodepsipeptide isolated from the marine sponge Homophymia lamellosa. This compound shows relevant cytotoxic activity in three human tumour cell lines and has unique structural features, with an abundance of non-proteinogenic residues, including several intriguing amino acids. Although the moieties present in the structure show high synthetic difficulty, the cornerstone is constituted by the unprecedented and highly hindered gamma-branched beta-hydroxy-alpha-amino acid D-allo-(2R,3R,4R)-2-amino-3-hydroxy-4,5-dimethylhexanoic acid (AHDMHA) residue, placed at the branching ester position and surrounded by the four demanding residues L-(2S,3S,4R)-3,4-dimethylglutamine, (2R,3R,4S)-4,7-diamino-2,3-dihydroxy-7-oxoheptanoic acid, D-allo-Thr and L-pipecolic acid. Here we describe the first total synthesis of a D-allo-AHDMHA-containing peptide, pipecolidepsin A, thus allowing chemical structure validation of the natural product and providing a robust synthetic strategy to access other members of the relevant head-to-side-chain family in a straightforward manner. FAU - Pelay-Gimeno, Marta AU - Pelay-Gimeno M AD - 1] Institute for Research in Biomedicine, Baldiri Reixac 10, 08028 Barcelona, Spain [2] CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Barcelona Science Park, 08028 Barcelona, Spain. FAU - Garcia-Ramos, Yesica AU - Garcia-Ramos Y FAU - Jesus Martin, Maria AU - Jesus Martin M FAU - Spengler, Jan AU - Spengler J FAU - Molina-Guijarro, Jose Manuel AU - Molina-Guijarro JM FAU - Munt, Simon AU - Munt S FAU - Francesch, Andres M AU - Francesch AM FAU - Cuevas, Carmen AU - Cuevas C FAU - Tulla-Puche, Judit AU - Tulla-Puche J FAU - Albericio, Fernando AU - Albericio F LA - eng SI - PubChem-Substance/163826383 SI - PubChem-Substance/163826384 SI - PubChem-Substance/163826385 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Nat Commun JT - Nature communications JID - 101528555 RN - 0 (Depsipeptides) RN - 0 (Pipecolic Acids) RN - 0 (pipecolidepsin A) SB - IM MH - Animals MH - Cell Line, Tumor MH - Depsipeptides/chemical synthesis/chemistry/*pharmacology MH - Female MH - HT29 Cells MH - Hep G2 Cells MH - Humans MH - MCF-7 Cells MH - Male MH - Neoplasms/*drug therapy MH - Pipecolic Acids/chemical synthesis/chemistry/*pharmacology MH - Porifera/metabolism MH - Structure-Activity Relationship EDAT- 2013/08/31 06:00 MHDA- 2014/04/09 06:00 CRDT- 2013/08/31 06:00 PHST- 2013/04/28 00:00 [received] PHST- 2013/07/24 00:00 [accepted] PHST- 2013/08/31 06:00 [entrez] PHST- 2013/08/31 06:00 [pubmed] PHST- 2014/04/09 06:00 [medline] AID - ncomms3352 [pii] AID - 10.1038/ncomms3352 [doi] PST - ppublish SO - Nat Commun. 2013;4:2352. doi: 10.1038/ncomms3352.