SMART: Pfam domain IQ

The domain within your query sequence starts at position 62 and ends at position 80; the E-value for the IQ domain shown below is 2.5e-4.

QTATTTMQAVFRGYAERKR

IQ

PFAM accession number:	PF00612
Interpro abstract (IPR000048):	The IQ motif is an extremely basic unit of about 23 amino acids, whose conserved core usually fits the consensus A-x(3)-I-Q-x(2)-F-R-x(4)-K-K. The IQ motif, which can be present in one or more copies, serves as a binding site for different EF-hand proteins including the essential and regulatory myosin light chains, calmodulin (CaM), and CaM-like proteins [ (PUBMED:1558751) (PUBMED:9141499) ].Many IQ motifs are protein kinase C (PKC) phosphorylation sites [ (PUBMED:1824695) (PUBMED:8424932) ]. Resolution of the 3D structure of scallop myosin has shown that the IQ motif forms a basic amphipathic helix [ (PUBMED:8127365) ]. Some proteins known to contain an IQ motif are listed below: A number of conventional and unconventional myosins. Neuromodulin (GAP-43). This protein is associated with nerve growth. It is a major component of the motile "growth cones" that form the tips of elongating axons. Neurogranin (NG/p17). Acts as a "third messenger" substrate of protein kinase C-mediated molecular cascades during synaptic development and remodeling. Sperm surface protein Sp17. Ras GTPase-activating-like protein IQGAP1. IQGAP1 contains 4 IQ motifs. This entry covers the entire IQ motif.
GO function:	protein binding (GO:0005515)

PFAM accession number:

PF00612

Interpro abstract (IPR000048):

The IQ motif is an extremely basic unit of about 23 amino acids, whose conserved core usually fits the consensus A-x(3)-I-Q-x(2)-F-R-x(4)-K-K. The IQ motif, which can be present in one or more copies, serves as a binding site for different EF-hand proteins including the essential and regulatory myosin light chains, calmodulin (CaM), and CaM-like proteins [ (PUBMED:1558751) (PUBMED:9141499) ].Many IQ motifs are protein kinase C (PKC) phosphorylation sites [ (PUBMED:1824695) (PUBMED:8424932) ].

Resolution of the 3D structure of scallop myosin has shown that the IQ motif forms a basic amphipathic helix [ (PUBMED:8127365) ].

Some proteins known to contain an IQ motif are listed below:

A number of conventional and unconventional myosins.
Neuromodulin (GAP-43). This protein is associated with nerve growth. It is a major component of the motile "growth cones" that form the tips of elongating axons.
Neurogranin (NG/p17). Acts as a "third messenger" substrate of protein kinase C-mediated molecular cascades during synaptic development and remodeling.
Sperm surface protein Sp17.
Ras GTPase-activating-like protein IQGAP1. IQGAP1 contains 4 IQ motifs.

This entry covers the entire IQ motif.

GO function:

protein binding (GO:0005515)

This is a PFAM domain. For full annotation and more information, please see the PFAM entry IQ