Chakraborty STyagi PTai D.-FLee G.-HSHIE-MING PENG2022-12-142022-12-14201314203049https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878271721&doi=10.3390%2fmolecules18054972&partnerID=40&md5=6c05d7538870c04d995e584a96725bc9https://scholars.lib.ntu.edu.tw/handle/123456789/626196The crystal structure of a naturally occurring cyclic tetrapeptide cyclo(Gly-LSer-L-Pro-L-Glu) [cyclo(GSPE)] was obtained. The conformation of synthesized cyclo(GSPE) fixes the coordination to lead ion in a 1:1 ratio. This cyclo(GSPE)-Pb complex was constructed as an asymmetric 3D network in the crystalline state. The polymerization of a heavy metal ion with a rigid asymmetric cyclic tetrapeptide represents the first example of a new class of macrocyclic complexes. © 1996-2013 MDPI AG (Basel, Switzerland).Coordination polymer; Crystal structures; Cyclic peptide; Lead; Macrocyclic chemistry; Natural product[SDGs]SDG14lead; oligopeptide; article; chemistry; protein motif; synthesis; X ray crystallography; Amino Acid Motifs; Crystallography, X-Ray; Lead; Oligopeptidesjournal article10.3390/molecules18054972236246502-s2.0-84878271721