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The molecular basis for the reversed root effect in the blood of the marine prosobranch buccinum undatum


, : The molecular basis for the reversed root effect in the blood of the marine prosobranch buccinum undatum. Molecular Physiology 1(4): 209-212

The mechanism of the reversed Root effect is an allosteric ligand interaction between Cl-, CO2 and H+ on the O2-binding sites of the respiratory pigment. Approximately 70% of the O2-binding sites of B. undatum hemocyanin are blocked at high Cl- concentration (700 mM). Low Cl- concentration (300 mM) increases the number of binding sites involved in O2 binding by as much as 48%, when blood PCO2 is increased, and pH is decreased from .apprx. 8.0-7.4.


Accession: 006719806

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Related references

Brix O.; Lykkeboe G.; Johansen K., 1979: Reversed bohr and root shifts in hemo cyanin of the marine prosobranch buccinum undatum adaptations to a periodically hypoxic habitat. O2 binding properties of the hemocyanin-containing blood of B. undatum were examined in vitro and in vivo under normoxic and hypoxic conditions at 10.degree. C. Blood pH and PO2 [partial O2 pressure] showed a decrease in vivo under hypoxic conditi...

Brix O., 1982: The adaptive significance of the reversed bohr and root shifts in blood from the marine gastropod buccinum undatum. The adjustments of blood respiratory properties to hypoxic conditions (PWO2 = 30 Torr) were investigated in relation to salinity acclimation in the marine prosobranch, B. undatum. In the whole blood the reversed Bohr effect and the cooperativity o...

Brix, O.; Lykkeboe, G.; Johansen, K., 1981: The influence of habitat factors on respiratory properties of the hemolymph from the marine prosobranch Buccinum undatum. Unknown

Sneli J A.; Mork J.A., 1979: The polymorphic prosobranch species buccinum undatum. Zoologica Scripta 8(4): 317

Welsch, U.; Storch, V., 1969: The osphradium of the prosobranch gastropods Buccinum undatum L. and Neptunea antiqua. Zeitschrift für Zellforschung und Mikroskopische Anatomie 95(2): 317-330

Hunt S., 1973: Fine structure of the secretory epithelium in the hypobranchial gland of the prosobranch gastropod mollusc buccinum undatum. Journal of the Marine Biological Association of the United Kingdom 53(1): 59-71

Hunt, S., 1973: Fine structure of the secretory epithelium in the hypobranchial gland of the prosobranch gastropod mollusc Buccinum undatum L. Journal of the Marine Biological Association of the United Kingdom, 531: 59-71

Vanhaelen, M-Th., 1999: Great increase in strandings of the whelk Buccinum undatum, complete with the animal, on the west coast from 1998 onwards Grote toename van wulkenstrandingen, Buccinum undatum, met dier, aan de Westkust vanaf 1998. Strandvlo. Juli; 193: 121-123

Torensma R.; Van Der Laan J.M.; Brix O.; Colosimo A.; Brunori M., 1984: The root effect of buccinum undatum hemo cyanin analysis of the oxygen binding. O2 equilibrium curves between B. undatum hemocyanin and O2 were determined under a number of different conditions in order to find a correlation between chemical effectors and the Reversed Root Effect. Equilibrium data could be quantitatively anal...

Beach, D.G.; Quilliam, M.A.; Rouleau, C.; Croll, R.P.; Hellou, J., 2010: Bioaccumulation and biotransformation of pyrene and 1-hydroxypyrene by the marine whelk Buccinum undatum. The fates of a phenolic contaminant and its hydrocarbon precursor have rarely been compared, especially in an invertebrate species. Two groups of Buccinum undatum were exposed to equimolar amounts of pyrene and 1-hydroxypyrene over 15 d through th...