Document Detail

Lipoproteins of the egg perivitelline fluid of Pomacea canaliculata snails (Mollusca: Gastropoda).
MedLine Citation:
PMID:  8972583     Owner:  NLM     Status:  MEDLINE    
The lipid and protein composition of the perivitelline fluid of the eggs of Pomacea canaliculata was investigated. Two lipoproteins (PV 1 and PV 2) and one lipoprotein fraction (PV 3) were detected for the first time in gastropods. They represent 57.0, 7.5, and 35.5% of the egg total proteins, respectively. PV 1 is a glyco-carotene-protein complex with characteristics of a very high-density lipoprotein (VHDL). It has 0.33% lipids, mainly free sterols and phospholipids. The particle has a MW of 300 Kd and is composed of three subunits of 35, 32, and 28 Kd, respectively. PV 2 particle is a VHDL of 400 Kd and 3.75% lipids. The major lipid classes are free sterols and phospholipids and also have significant quantities of energy-providing triacylglycerides and free fatty acids. It is composed of two apoproteins of 67 and 31 Kd. PV 3 density corresponds to a high-density lipoprotein (HDL). It was fractionated into two subfractions "h" and "p". Fraction "h" contains 5.16% lipids, mainly free sterols, phospholipids, and free fatty acids, and two particles of 100 and 64 Kd. Dissociating electrophoresis showed two subunits of 34 and 29 Kd. Fraction "p" is composed of a single particle of 26 Kd that contains 9.5% lipids, which represents 30% of the total egg lipids. It has high levels of a carotenoid pigment. Besides it contains free fatty acids, hydrocarbons, sterified sterols, and triacylglycerides. These three fractions are probably the major supply of lipids and amino acids for the developing embryo.
C F Garin; H Heras; R J Pollero
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of experimental zoology     Volume:  276     ISSN:  0022-104X     ISO Abbreviation:  J. Exp. Zool.     Publication Date:  1996 Dec 
Date Detail:
Created Date:  1997-01-22     Completed Date:  1997-01-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375365     Medline TA:  J Exp Zool     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  307-14     Citation Subset:  IM    
Instituto de Investigaciones Bioquímicas de la Plata (INIBIOLP), CONICET-UNLP, (1900) La Plata, Argentina.
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MeSH Terms
Chromatography, High Pressure Liquid
Chromatography, Ion Exchange
Electrophoresis, Polyacrylamide Gel
Lipoproteins / isolation & purification,  metabolism*
Mollusca / metabolism*
Ovum / metabolism*
Reg. No./Substance:

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