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Small-angle X-ray study on the quaternary structure of erythrocruorin from Helisoma trivolvis |
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| Authors: | Ingrid Pilz and E. Schwarz Yossi Tsfadia and Ezra Daniel |
| Affiliation: | a Institut für Physikalische Chemie der Universität Graz, Heinrichstrasse 28, A-8010, Graz, Austria b Department of Biochemistry, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel |
| Abstract: | The erythrocruorin from the aquatic snail Helisoma trivolvis was studied in sodium phosphate buffer at pH 6.7 by small angle X-ray scattering. The following molecular parameters were determined: radius of gyration 9.4 ± 0.1 nm and maximum dimension 29 ± 1 nm. A model which fits the experimental data well is presented. The overall shape is best described by a slightly ellipsoidal shape with a hole in the centre. A model consisting of 12 subunits forming a slightly ellipsoidal shape fits very well all scattering data. |
| Keywords: | Small angle X-ray scattering structure determination erythrocruorin haemoglobin |
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