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Crystal Structure of Trichosanthes Kirilowii Lectin-1 and its Relation to the Type 2 Ribosome Inactivating Proteins

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Abstract:

Crystal structure of a two-chain lectin, isolated from the tuber of Trichosanthes kirilowii, was solved by the molecular replacement method using abrin-a as probe. From the present density map at 2.7A resolution, it could be seen that a residue corresponding to an invariant tyrosine locating in the active site of ribosome-inactivating proteins (RIPs) is replaced with a non-aromatic one. This may be the reason why this kind of lectins has no RIPs activity, even though they possess some properties similar to type 2 RIPs.
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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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