Abstract
SH3 (Src Homolgy 3) domains are small protein modules of about 50-60 residues. It is found in proteins involved in several biological processes as diverse as signal transduction pathways, cytoskeleton organization, membrane traffic or organelle assembly. SH3 domains bind to proline-rich peptides that form a left-handed polyproline type II helix (PPII) in one of two opposite orientations. Ligand orientation depends on the position of the positive residue in the target peptide. Peptides that bind in a type I orientation contain the consensus R/KXXPXXP, while the type II orientation conform to the PXXPXR/K consensus
Selected references
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This ELM has been assigned the following Gene Ontology (GO) terms for biological process, cellular component and molecular function.
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Biological Process |
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cell growth and/or maintenance
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cell communication
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signal transduction
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Cellular Component |
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plasma membrane |
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focal adhesion |
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cytosol |
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Molecular Function |
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Binding |
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protein binding |
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protein domain specific binding |
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SH3-domain binding |
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