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1h8n

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{{STRUCTURE_1h8n| PDB=1h8n | SCENE= }}
{{STRUCTURE_1h8n| PDB=1h8n | SCENE= }}
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'''THREE-DIMENSIONAL STRUCTURE OF ANTI-AMPICILLIN SINGLE CHAIN FV FRAGMENT FROM PHAGE-DISPLAYED MURINE ANTIBODY LIBRARIES'''
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===THREE-DIMENSIONAL STRUCTURE OF ANTI-AMPICILLIN SINGLE CHAIN FV FRAGMENT FROM PHAGE-DISPLAYED MURINE ANTIBODY LIBRARIES===
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==Overview==
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The N-terminal segment (FR-H1) of the heavy chain (V(H)) of antibodies shows significant conformational variability correlating with the nature of the amino acids H6, H7 and H10 (Kabat H9). In this study, we have established a causal relationship between the local sequence and the structure of this framework region and linked this relationship to important biophysical properties such as affinity, folding yield and stability. We have generated six mutants of the scFv fragment aL2, covering some of the most abundant amino acid combinations in positions H6, H7 and H10 (according to a new consensus nomenclature, Kabat H9). For the aL2 wild-type (w.t.) with the sequence 6(Q)7(P)10(A) and for two of the mutants, the X-ray structures have been determined. The structure of the triple mutant aL2-6(E)7(S)10(G) shows the FR-H1 backbone conformations predicted for this amino acid combination, which is distinctly different from the structure of the w.t, thus supporting our hypothesis that these residues determine the conformation of this segment. The mutant aL2-6(E)7(P)10(G) represents a residue combination not occurring in natural antibody sequences. It shows a completely different, unique structure in the first beta-strand of V(H), not observed in natural Fv fragments and forms a novel type of diabody. Two V(H) domains of the mutant associate by swapping the first beta-strand. Concentration-dependent changes in Trp fluorescence indicate that this dimerization also occurs in solution. The mutations in amino acids H6, H7 and H10 (Kabat H9) influence the dimerization behavior of the scFv and its thermodynamic stability. All the observations reported here have practical implications for the cloning of Fv fragments with degenerate primers, as well as for the design of new antibodies by CDR grafting or synthetic libraries.
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{{ABSTRACT_PUBMED_11397090}}
==About this Structure==
==About this Structure==
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[[Category: Antibody]]
[[Category: Antibody]]
[[Category: Framework]]
[[Category: Framework]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 06:48:49 2008''

Revision as of 03:49, 1 July 2008

Image:1h8n.png

Template:STRUCTURE 1h8n

THREE-DIMENSIONAL STRUCTURE OF ANTI-AMPICILLIN SINGLE CHAIN FV FRAGMENT FROM PHAGE-DISPLAYED MURINE ANTIBODY LIBRARIES

Template:ABSTRACT PUBMED 11397090

About this Structure

1H8N is a Single protein structure of sequence from Mouse e 010090. Full crystallographic information is available from OCA.

Reference

The importance of framework residues H6, H7 and H10 in antibody heavy chains: experimental evidence for a new structural subclassification of antibody V(H) domains., Jung S, Spinelli S, Schimmele B, Honegger A, Pugliese L, Cambillau C, Pluckthun A, J Mol Biol. 2001 Jun 8;309(3):701-16. PMID:11397090

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