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Titolo:
PROTEOLYSIS OF JAPANESE-QUAIL AND CHICKEN PLASMA APOLIPOPROTEIN-B ANDVITELLOGENIN BY CATHEPSIN-D - SIMILARITY OF THE RESULTING PROTEIN-FRAGMENTS WITH EGG-YOLK POLYPEPTIDES
Autore:
ELKIN RG; FREED MB; DANETZ SAH; BIDWELL CA;
Indirizzi:
PURDUE UNIV,DEPT ANIM SCI,1151 LILLY HALL W LAFAYETTE IN 47907
Titolo Testata:
Comparative biochemistry and physiology. B. Comparative biochemistry
fascicolo: 2, volume: 112, anno: 1995,
pagine: 191 - 196
SICI:
0305-0491(1995)112:2<191:POJACP>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW-DENSITY-LIPOPROTEIN; MOLECULAR ASPECTS; RECEPTOR; OOCYTE; DEPOSITION; HENS;
Keywords:
APOLIPOPROTEIN B; CATHEPSIN D; CHICKEN; JAPANESE QUAIL; LIPOVITELLIN; PHOSVITIN; VERY-LOW DENSITY LIPOPROTEIN; VITELLOGENIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
R.G. Elkin et al., "PROTEOLYSIS OF JAPANESE-QUAIL AND CHICKEN PLASMA APOLIPOPROTEIN-B ANDVITELLOGENIN BY CATHEPSIN-D - SIMILARITY OF THE RESULTING PROTEIN-FRAGMENTS WITH EGG-YOLK POLYPEPTIDES", Comparative biochemistry and physiology. B. Comparative biochemistry, 112(2), 1995, pp. 191-196

Abstract

Plasma very-low density lipoprotein (VLDL) and vitellogenin (VTG) from mature female Japanese quail (Coturnix coturnix japonica) and chickens (Gallus domesticus) were isolated and digested in vitro with cathepsin D (EC3.4.23.5). The incubation mixtures were then reduced and subjected to gradient (4.5-18%) SDS-polyacrylamide gel electrophoresis, Protein fragments were stained with either Coomassie Brilliant Blue R-250 (VLDL digests) or Coomassie Brilliant Blue R-250 containing 20 mM AlCl3 (VTG digests). Fragments resulting from the in vitro enzymatic digestion of quail and chicken plasma VLDL-apolipoprotein B (apo B) and VTG closely resembled those produced in vivo and isolated from egg yolks of each respective specie. Phosvitin, a proteolytically derived fragment of VTG, primarily existed as a single band (M(r) similar to 42 kDa) in Japanese quail yolk granules, In contrast, chicken phosvitin mainly consisted of a cluster of phosphoproteins ranging in size from similar to 37 to 45 kDa. In addition to reporting a novel species difference in phosvitin moieties, the present study is the first to examine the role of cathepsin D in the generation of egg yolk proteins from plasma precursors in Japanese quail, Confirmatory evidence also was provided concerning the important role of this aspartic endopeptidase in the proteolytic cleavage of plasma VLDL-apo B and VTG in the chicken.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 14:23:28