2vh5

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spinqualitylabelsall models 2vh5, resolution 2.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

CRYSTAL STRUCTURE OF HRAS(G12V)- ANTI-RAS FV (DISULFIDE FREE MUTANT) COMPLEX

Overview

Many disease-related processes occur via protein complexes that are, considered undruggable with small molecules. An example is RAS, which is, frequently mutated in cancer and contributes to initiation and maintenance, of the disease by constitutive signal transduction through protein, interaction with effector proteins, like PI3K, RAF and RALGDS. Such, protein interactions are therefore significant targets for therapy. We, describe a single immunoglobulin variable region domain that specifically, binds to activated GTP-bound RAS and prevents RAS-dependent tumorigenesis, in a mouse model. The crystal structure of the immunoglobulin-RAS complex, shows that the variable region competitively binds to the conformationally, variant regions of RAS, where its signalling effector molecules interact., This allows the plasma membrane targeted single domain intrabody to, inhibit signalling by mutant RAS. This mode of action is a novel advance, to directly interfere with oncogenic RAS function in human cancer and, shows a universally applicable approach to develop macromolecules to, combat cancer. In addition, this method illustrates a general means for, interfering with protein interactions that are commonly considered, intractable as conventional drug targets.

About this Structure

2VH5 is a Protein complex structure of sequences from Homo sapiens with , and as ligands. Known structural/functional Sites: , and . Full crystallographic information is available from OCA.

Reference

Tumour prevention by a single antibody domain targeting the interaction of signal transduction proteins with RAS., Tanaka T, Williams RL, Rabbitts TH, EMBO J. 2007 Jul 11;26(13):3250-9. Epub 2007 Jun 14. PMID:17568777

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