NEB-COLLOOSTATIN, A 2ND FOLLICULOSTATIN OF THE GREY FLESHFLY, NEOBELLIERIA-BULLATA

被引:34
作者
BYLEMANS, D
PROOST, P
SAMIJN, B
BOROVSKY, D
GRAUWELS, L
HUYBRECHTS, R
VANDAMME, J
VANBEEUMEN, J
DELOOF, A
机构
[1] KATHOLIEKE UNIV LEUVEN,INST ZOOL,B-3000 LOUVAIN,BELGIUM
[2] KATHOLIEKE UNIV LEUVEN,REGA INST,B-3001 LOUVAIN,BELGIUM
[3] STATE UNIV GHENT,PROT CHEM LAB,GHENT,BELGIUM
[4] UNIV FLORIDA,INST FOOD & AGR SCI,FLORIDA MED ENTOMOL LAB,VERO BEACH,FL 32962
来源
EUROPEAN JOURNAL OF BIOCHEMISTRY | 1995年 / 228卷 / 01期
关键词
COLLAGEN; DIPTERA; GROWTH HORMONE; INSECTS; MATRIX PROTEIN;
D O I
10.1111/j.1432-1033.1995.tb20226.x
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
During the purification of trypsin-modulating oostatic factor (TMOF) of the grey fleshfly Neobellieria bullata, a new factor with oostatic activity was discovered. We report herein its purification, primary structure and effects on oocyte development. Its amino acid sequence was determined as H-SIVPLGLPVPIGPIVVGPR-OH. Due to structural sequence similarities with parts of several known collagens and its oostatic activity, we named it Neb-colloostatin. The synthetic peptide inhibits yolk uptake by previtellogenic oocytes and might have a role in the abscence of yolk deposition in penultimate oocytes. Neb-colloostatin does not inhibit trypsin biosynthesis in the gut or ecdysone biosynthesis by larval ring glands. It decreases vitellogenin concentrations in the hemolymph by an unknown mode of action. The role of ext acellular matrix proteins in the feedback control of growth is discussed.
引用
收藏
页码:45 / 49
页数:5
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