1dfk Summary

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NUCLEOTIDE-FREE SCALLOP MYOSIN S1-NEAR RIGOR STATE

The structure was published by Houdusse, A., Szent-Gyorgyi, A.G., and Cohen, C., in 2000 in a paper entitled "Three conformational states of scallop myosin S1." (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 4.2 Å and deposited in 1999.

The experimental data on which the structure is based was not deposited.

This PDB entry contains a complex of 3 biomacromolecules, namely MYOSIN HEAD.

It also contains one or more heterogenic compounds (e.g., ligands, co-factors, ions, modified amino acids, etc.); see here for a complete list.

The molecule most likely forms heterotrimers.

The following tables show cross-reference information to other databases (to obtain a list of all PDB entries sharing the same property or classification, click on the magnifying glass icon):


Chain Name UniProt Name of source organism % of UniProt sequence present in the sample Residues in the sample molecules % of residues observed
A MYOSIN HEAD P24733 (6-835) (MYS_ARGIR)search Argopecten irradianssearch < 90% 830 87%
Y MYOSIN HEAD P13543 (13-151) (MLR_ARGIR)search Argopecten irradianssearch 92% 139 100%
Z MYOSIN HEAD P07291 (4-155) (MLE_ARGIR)search Argopecten irradianssearch 95% 152 100%


This entry contains 3 unique UniProt proteins:

UniProt accession Name Organism PDB
P24733 (6 - 835) MYOSIN HEAD Argopecten irradians
P13543 (13 - 151) MYOSIN HEAD Argopecten irradians
P07291 (4 - 155) MYOSIN HEAD Argopecten irradians

Chain Structural classification (SCOP) Sequence family (Pfam)
A Myosin S1 fragment, N-terminal domainsearch, Motor proteinssearch Myosin head (motor domain)search, IQ calmodulin-binding motifsearch, Myosin N-terminal SH3-like domainsearch
Y (P13543) Calmodulin-likesearch PF00036: EF handsearch
Z (P07291) Calmodulin-likesearch

Chain ID Molecular function (GO) Cellular component (GO)
A (P24733) ATP bindingsearch motor activitysearch myosin complexsearch
Y (P13543) calcium ion bindingsearch
Z (P07291) calcium ion bindingsearch myosin complexsearch

Chain InterPro annotation
A IQ motif, EF-hand binding sitesearch Myosin head, motor domainsearch Myosin, N-terminal, SH3-likesearch Myosin-like IQ motif-containing domainsearch P-loop containing nucleoside triphosphate hydrolasesearch
Y EF-hand domainsearch EF-hand domain pairsearch EF-Hand 1, calcium-binding sitesearch
Z EF-hand domainsearch EF-hand domain pairsearch