A biophysical elucidation for less toxicity of Agglutinin than Abrin-a from the Seeds of Abrus Precatorius in consequence of crystal structureCheng, J., Lu, T.H., Liu, C.L., Lin, J.Y.
(2010) J.Biomed.Sci. 17: 34-34
- PubMed: 20433687
- DOI: 10.1186/1423-0127-17-34
- PubMed Abstract:
- Structure-function analysis and insights into the reduced toxicity of Abrus precatorius agglutinin I in relation to abrin
Bagaria, A.,Surendranath, K.,Ramagopal, U.A.,Ramakumar, S.,Karande, A.A.
(2006) J.Biol.Chem. 281: 34465
- Crystal structure of abrin-a at 2.14 A
Tahirov, T.H.,Lu, T.-H.,Liaw, Y.-C.,Chen, Y.-L.,Lin, J.-Y.
(1995) J.Mol.Biol. 250: 354
- Crystallization of agglutinin from the seeds of Abrus precatorius
Panneerselvam, K.,Lin, S.-C.,Liu, C.-L.,Liaw, Y.-C.,Lin, J.-Y.,Lu, T.-H.
(2000) Acta Crystallogr.,Sect.D 56: 898
- Primary structure and function analysis of the Abrus precatorius agglutinin A chain by site-directed mutagenesis. Pro(199) Of amphiphilic alpha-helix H impairs protein synthesis inhibitory activity
Liu, C.-L.,Tsai, C.-C.,Lin, S.-C.,Wang, L.-I.,Hsu, C.-I.,Hwang, M.-J.,Lin, J.-Y.
(2000) J.Biol.Chem. 275: 1897
X-ray crystal structure determination of agglutinin from Abrus precatorius in Taiwan is presented. The crystal structure of agglutinin, a type II ribosome-inactivating protein (RIP) from the seeds of Abrus precatorius in Taiwan, has been determined f ...
X-ray crystal structure determination of agglutinin from Abrus precatorius in Taiwan is presented. The crystal structure of agglutinin, a type II ribosome-inactivating protein (RIP) from the seeds of Abrus precatorius in Taiwan, has been determined from a novel crystalline form by the molecular replacement method using the coordinates of abrin-a as the template. The structure has space group P4(1)2(1)2 with Z = 8, and been refined at 2.6 A to R-factor of 20.4%. The root-mean-square deviations of bond lengths and angles from the standard values are 0.009 A and 1.3 degrees. Primary, secondary, tertiary and quaternary structures of agglutinin have been described and compared with those of abrin-a to a certain extent. In subsequent docking research, we found that Asn200 of abrin-a may form a critical hydrogen bond with G4323 of 28SRNA, while corresponding Pro199 of agglutinin is a kink hydrophobic residue bound with the cleft in a more compact complementary relationship. This may explain the lower toxicity of agglutinin than abrin-a, despite of similarity in secondary structure and the activity cleft of two RIPs.
Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan.