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PMID:10875774

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Citation

Dominguez-Vera, JM, Gautron, J, Garcia-Ruiz, JM and Nys, Y (2000) The effect of avian uterine fluid on the growth behavior of calcite crystals. Poult. Sci. 79:901-7

Abstract

Eggshell formation takes place on the eggshell membrane in an acellular medium, the uterine fluid that contains the inorganic minerals and precursors of the organic matrix. The high degree of eggshell structure could be due to an interaction between calcium carbonate and the organic matrix. The aim of this study was to demonstrate such an interaction by measuring the effect in vitro of uterine fluid collected at various phases of shell formation on precipitation kinetics, size, and morphology of calcite crystals. The SDS-PAGE profiles of the organic constituents differed between the different phases of eggshell formation. The predominant constituents were ovalbumin and ovotransferrin at the initial phase and lysozyme, ovocleidin-17, ovocalyxin-32, 36- and 21-kDa bands, and ovocleidin-116 at the growth phase. These proteins were numerous in the terminal phase and showed an increased staining of the 32- and 66-kDa bands and appearance of very low molecular weight bands. The precipitation lag time was shortened in proportion to the protein concentration at the initial stage. The effect was observed with a lower magnitude in the presence of constituents of growth and terminal phases. Crystal size was smaller in the presence of constituents from the three stages compared with the control. Components from the initial phase induced the formation of twinned crystals and of rounded corners in the rhombohedric crystals. The presence of components from the growth and terminal phases strongly modified the morphology of the calcite crystals. The majority of the corners became rough and developed curved faces. These observations confirm the interaction of the uterine fluid with calcite and its contribution to eggshell structure.

Links

PubMed

Keywords

Animals; Body Fluids/chemistry; Calcium Carbonate/chemistry; Chemical Precipitation; Chickens/metabolism; Conalbumin/analysis; Crystallization; Egg Shell/chemistry; Electrophoresis, Polyacrylamide Gel; Female; Kinetics; Molecular Weight; Muramidase/analysis; Ovalbumin/analysis; Uterus/metabolism

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

CHICK:OC116

located_in

GO:0005615: extracellular space

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

CHICK:LYSC

located_in

GO:0005615: extracellular space

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

CHICK:TRFE

located_in

GO:0005615: extracellular space

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

CHICK:OCX32

located_in

GO:0005615: extracellular space

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

CHICK:OC17

located_in

GO:0005615: extracellular space

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

CHICK:LYSC

part_of

GO:0005615: extracellular space

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

CHICK:OC17

part_of

GO:0005615: extracellular space

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

CHICK:OCX32

part_of

GO:0005615: extracellular space

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

CHICK:TRFE

part_of

GO:0005615: extracellular space

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

CHICK:OC116

part_of

GO:0005615: extracellular space

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete


See also

References

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