首页 | 本学科首页   官方微博 | 高级检索  
   检索      


A phycourobilin-containing phycoerythrin from the cyanobacterium Oscillatoria sp.
Authors:Igor N Stadnichuk  Natalya I Romanova  Irina O Selyakh
Institution:(1) School of Biology, Lomonosov State University, 119899 Moscow, USSR
Abstract:A filamentous cyanobacterium Oscillatoria sp. was isolated from a thermal spring of the Kamchatka peninsula. It contained a phycoerythrin unusual for cyanobacteria in that it had a phycourobilin prosthetic group. The absorption spectrum of the native purified phycoerythrin displayed maxima at 498 and 567 nm. The phycoerythrin comprised agr- and beta-subunits of molecular weights 18,700 and 19,800, respectively, in 1:1 stoichiometry. Polyacrylamide gel isoelectric focusing revealed one protein band at pI 4.6. The agr- and beta-subunits differed in their chromophore composition and content: agr-subunit carried two phycoerythrobilins while the beta-subunit had three phycoerythrobilins and one phycourobilin. The chromophore composition of all known phycoerythrins of cyanobacteria and red algae were compared, and on the basis of this comparative study designations C1- to C5-phycoerythrin were proposed for cyanobacterial red pigments.
Keywords:Oscillatoria sp    Phycoerythrin(s)  Phycobiliprotein(s)  Phycoerythrobilin  Phycourobilin
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号