1SR6 Contractile Protein date Mar 22, 2004
title Structure Of Nucleotide-Free Scallop Myosin S1
authors D.Risal, S.Gourinath, D.M.Himmel, A.G.Szent-Gyorgyi, C.Cohen
compound source
Molecule: Myosin Heavy Chain, Striated Muscle
Chain: A
Organism_scientific: Argopecten Irradians
Organism_taxid: 31199

Molecule: Myosin Regulatory Light Chain, Striated Adductor Muscle;
Chain: B
Synonym: R-Lc

Organism_scientific: Argopecten Irradians
Organism_taxid: 31199

Molecule: Myosin Essential Light Chain, Striated Adductor Muscle;
Chain: C
Synonym: E-Lc, Sulfhydryl Light Chain, Shlc

Organism_scientific: Argopecten Irradians
Organism_taxid: 31199
symmetry Space Group: P 1 21 1
R_factor 0.242 R_Free 0.286
length a length b length c angle alpha angle beta angle gamma
83.591 51.109 162.329 90.00 98.02 90.00
method X-Ray Diffractionresolution 2.75 Å
ligand CA, MG, SO4 enzyme
related structures by homologous chain: 1QVI, 1SCM



Primary referenceMyosin subfragment 1 structures reveal a partially bound nucleotide and a complex salt bridge that helps couple nucleotide and actin binding., Risal D, Gourinath S, Himmel DM, Szent-Gyorgyi AG, Cohen C, Proc Natl Acad Sci U S A 2004 Jun 15;101(24):8930-5. Epub 2004 Jun 7. PMID:15184651
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (188 Kb) [Save to disk]
  • Biological Unit Coordinates (1sr6.pdb1.gz) 182 Kb
  • LPC: Ligand-Protein Contacts for 1SR6
  • CSU: Contacts of Structural Units for 1SR6
  • Likely Quarternary Molecular Structure file(s) for 1SR6
  • Structure Factors (474 Kb)
  • Retrieve 1SR6 in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1SR6 from S2C, [Save to disk]
  • Re-refined 1sr6 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 1SR6 in 3D
  • Proteopedia, because life has more than 2D.
  • On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure.
  • On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.
  • Visual 3D analysis of 1SR6
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Electron Density related parameters from EDS Electron Density Server, at Upsala
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 1SR6, from MSDmotif at EBI
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1sr6a1, region A:29-76 [Jmol] [rasmolscript] [script source]
        - Domain d1sr6a2, region A:6-28,A:77-837 [Jmol] [rasmolscript] [script source]
        - Domain d1sr6b_, region B [Jmol] [rasmolscript] [script source]
        - Domain d1sr6c_, region C [Jmol] [rasmolscript] [script source]
  • Fold representative 1sr6 from FSSP and Dali (Families of Structurally Similar Proteins)
  • Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH
  • Summaries and structural analyses of PDB data files from PDBSum
  • Identification of Protein Pockets & Cavities at CASTp
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [1sr6] [1sr6_B] [1sr6_A] [1sr6_C]
  • SWISS-PROT database: [P07291] [P13543] [P24733]
  • Domain organization of [MLE_AEQIR] [MLR_AEQIR] [MYS_AEQIR] by SWISSPFAM
  • Domains found in 1SR6: [EFh] [IQ] [MYSc ] by SMART
  • Other resources with information on 1SR6
  • Community annotation for 1SR6 at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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