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- PDB-2f3z: Calmodulin/IQ-AA domain complex -

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Basic information

Entry
Database: PDB / ID: 2f3z
TitleCalmodulin/IQ-AA domain complex
Components
  • Calmodulin
  • Voltage-dependent L-type calcium channel alpha-1C subunit
KeywordsMETAL BINDING PROTEIN / calmodulin / calmodulin complex / calcium channnel / Cav1.2 / IQ domain / IQ-AA mutant domain
Function / homology
Function and homology information


voltage-gated calcium channel activity involved in AV node cell action potential / voltage-gated calcium channel activity involved in cardiac muscle cell action potential / immune system development / membrane depolarization during atrial cardiac muscle cell action potential / Phase 2 - plateau phase / calcium ion transmembrane transport via high voltage-gated calcium channel / positive regulation of muscle contraction / positive regulation of adenylate cyclase activity / membrane depolarization during AV node cell action potential / high voltage-gated calcium channel activity ...voltage-gated calcium channel activity involved in AV node cell action potential / voltage-gated calcium channel activity involved in cardiac muscle cell action potential / immune system development / membrane depolarization during atrial cardiac muscle cell action potential / Phase 2 - plateau phase / calcium ion transmembrane transport via high voltage-gated calcium channel / positive regulation of muscle contraction / positive regulation of adenylate cyclase activity / membrane depolarization during AV node cell action potential / high voltage-gated calcium channel activity / : / cardiac conduction / L-type voltage-gated calcium channel complex / establishment of protein localization to mitochondrial membrane / membrane depolarization during cardiac muscle cell action potential / cell communication by electrical coupling involved in cardiac conduction / type 3 metabotropic glutamate receptor binding / regulation of ventricular cardiac muscle cell action potential / camera-type eye development / NCAM1 interactions / cardiac muscle cell action potential involved in contraction / embryonic forelimb morphogenesis / calcium ion transport into cytosol / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / Calmodulin induced events / : / positive regulation of cyclic-nucleotide phosphodiesterase activity / Reduction of cytosolic Ca++ levels / Activation of Ca-permeable Kainate Receptor / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Loss of phosphorylation of MECP2 at T308 / voltage-gated calcium channel complex / CREB1 phosphorylation through the activation of Adenylate Cyclase / PKA activation / negative regulation of high voltage-gated calcium channel activity / CaMK IV-mediated phosphorylation of CREB / Glycogen breakdown (glycogenolysis) / nitric-oxide synthase binding / response to corticosterone / positive regulation of DNA binding / negative regulation of calcium ion export across plasma membrane / organelle localization by membrane tethering / regulation of synaptic vesicle exocytosis / CLEC7A (Dectin-1) induces NFAT activation / Activation of RAC1 downstream of NMDARs / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / presynaptic endocytosis / regulation of cardiac muscle cell action potential / negative regulation of peptidyl-threonine phosphorylation / positive regulation of ryanodine-sensitive calcium-release channel activity / regulation of cell communication by electrical coupling involved in cardiac conduction / negative regulation of ryanodine-sensitive calcium-release channel activity / Synthesis of IP3 and IP4 in the cytosol / calcium ion import across plasma membrane / Phase 0 - rapid depolarisation / alpha-actinin binding / Negative regulation of NMDA receptor-mediated neuronal transmission / regulation of heart rate by cardiac conduction / Unblocking of NMDA receptors, glutamate binding and activation / regulation of synaptic vesicle endocytosis / RHO GTPases activate PAKs / Ion transport by P-type ATPases / Uptake and function of anthrax toxins / protein phosphatase activator activity / adenylate cyclase binding / Regulation of MECP2 expression and activity / Long-term potentiation / regulation of ryanodine-sensitive calcium-release channel activity / Calcineurin activates NFAT / DARPP-32 events / : / Smooth Muscle Contraction / regulation of cardiac muscle contraction / detection of calcium ion / RHO GTPases activate IQGAPs / phosphatidylinositol 3-kinase binding / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / calcium channel inhibitor activity / voltage-gated calcium channel activity / presynaptic cytosol / catalytic complex / cellular response to interferon-beta / Protein methylation / activation of adenylate cyclase activity / Activation of AMPK downstream of NMDARs / positive regulation of protein autophosphorylation / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / enzyme regulator activity / Ion homeostasis / eNOS activation / regulation of calcium-mediated signaling / titin binding / voltage-gated potassium channel complex / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / sperm midpiece / calcium channel complex / substantia nigra development
Similarity search - Function
Voltage-dependent calcium channel, L-type, alpha-1C subunit / Voltage-gated calcium channel subunit alpha, C-terminal / Voltage-gated calcium channel subunit alpha, C-term / Voltage-dependent calcium channel, L-type, alpha-1 subunit / Voltage-dependent calcium channel, alpha-1 subunit, IQ domain / Voltage gated calcium channel IQ domain / Voltage gated calcium channel IQ domain / Voltage-dependent calcium channel, alpha-1 subunit / Voltage-dependent L-type calcium channel, IQ-associated domain / Voltage-dependent L-type calcium channel, IQ-associated ...Voltage-dependent calcium channel, L-type, alpha-1C subunit / Voltage-gated calcium channel subunit alpha, C-terminal / Voltage-gated calcium channel subunit alpha, C-term / Voltage-dependent calcium channel, L-type, alpha-1 subunit / Voltage-dependent calcium channel, alpha-1 subunit, IQ domain / Voltage gated calcium channel IQ domain / Voltage gated calcium channel IQ domain / Voltage-dependent calcium channel, alpha-1 subunit / Voltage-dependent L-type calcium channel, IQ-associated domain / Voltage-dependent L-type calcium channel, IQ-associated / : / : / Voltage-dependent channel domain superfamily / EF-hand / Recoverin; domain 1 / EF-hand domain pair / EF-hand, calcium binding motif / EF-Hand 1, calcium-binding site / EF-hand calcium-binding domain. / EF-hand calcium-binding domain profile. / EF-hand domain / Ion transport domain / Ion transport protein / EF-hand domain pair / Orthogonal Bundle / Mainly Alpha
Similarity search - Domain/homology
Calmodulin-1 / Calmodulin-3 / Voltage-dependent L-type calcium channel subunit alpha-1C / Voltage-dependent L-type calcium channel subunit alpha-1C
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.6 Å
AuthorsFallon, J.L. / Quiocho, F.A.
Citation
Journal: Structure / Year: 2005
Title: Structure of Calmodulin Bound to the Hydrophobic IQ Domain of the Cardiac Ca(v)1.2 Calcium Channel.
Authors: Fallon, J.L. / Halling, D.B. / Hamilton, S.L. / Quiocho, F.A.
#1: Journal: Am.J.Physiol., Cell Physiol. / Year: 2005
Title: Calmodulin interactions with IO peptides from voltage-dependent calcium channels
Authors: J Black, D. / Halling, D.B. / Mandich, D.V. / Pedersen, S.E. / Altshuld, R.A. / Hamilton, S.L.
#2: Journal: Science / Year: 1992
Title: Target enzyme recognition by calmodulin: 2.4 A structure of a calmodulin-peptide complex
Authors: Meador, W.E. / Means, A.R. / Quiocho, F.A.
#3: Journal: Structure / Year: 2003
Title: A closed compact structure of native Ca2+-calmodulin
Authors: Fallon, J.L. / Quiocho, F.A.
History
DepositionNov 22, 2005Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 27, 2005Provider: repository / Type: Initial release
Revision 1.1May 1, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Oct 18, 2017Group: Refinement description / Category: software
Item: _software.classification / _software.contact_author ..._software.classification / _software.contact_author / _software.contact_author_email / _software.date / _software.language / _software.location / _software.name / _software.type / _software.version
Revision 1.4Oct 20, 2021Group: Database references / Derived calculations
Category: database_2 / pdbx_struct_conn_angle ...database_2 / pdbx_struct_conn_angle / struct_conn / struct_ref_seq_dif / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_seq_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.5Aug 23, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Calmodulin
B: Voltage-dependent L-type calcium channel alpha-1C subunit
hetero molecules


Theoretical massNumber of molelcules
Total (without water)19,5896
Polymers19,4292
Non-polymers1604
Water3,117173
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area2810 Å2
ΔGint-76 kcal/mol
Surface area8900 Å2
MethodPISA
Unit cell
Length a, b, c (Å)86.260, 31.370, 64.110
Angle α, β, γ (deg.)90.00, 115.89, 90.00
Int Tables number5
Space group name H-MC121
Components on special symmetry positions
IDModelComponents
11A-328-

HOH

21A-329-

HOH

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Components

#1: Protein Calmodulin / CaM


Mass: 16721.350 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: calm1, calm2, calm3 / Plasmid: pET3a / Species (production host): Escherichia coli / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / References: UniProt: P62158, UniProt: P0DP23*PLUS
#2: Protein/peptide Voltage-dependent L-type calcium channel alpha-1C subunit / Voltage- gated calcium channel alpha subunit Cav1.2 / Calcium channel / L type / alpha-1 ...Voltage- gated calcium channel alpha subunit Cav1.2 / Calcium channel / L type / alpha-1 polypeptide / isoform 1 / cardiac muscle


Mass: 2707.196 Da / Num. of mol.: 1 / Mutation: I1672A, Q1673A / Source method: obtained synthetically / Details: a mutant IQ domain of the cardiac Cav1.2 channel / References: UniProt: Q13933, UniProt: Q13936*PLUS
#3: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Ca
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 173 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.01 Å3/Da / Density % sol: 38.75 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 8.3
Details: 32% PEG 4000, 50mM TRIS, 50 mM MgCl2, pH 8.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: CAMD / Beamline: GCPCC / Wavelength: 1.24242 Å
DetectorType: MARRESEARCH / Detector: CCD / Date: Apr 27, 2005
RadiationMonochromator: Si / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.24242 Å / Relative weight: 1
ReflectionResolution: 1.6→50 Å / Num. all: 20711 / Num. obs: 19475 / % possible obs: 94.2 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.5 % / Rmerge(I) obs: 0.038 / Χ2: 0.898
Reflection shellResolution: 1.6→1.66 Å / Redundancy: 2.8 % / Rmerge(I) obs: 0.188 / Num. unique all: 1446 / Χ2: 0.49 / % possible all: 70.1

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Processing

Software
NameVersionClassificationNB
DENZOdata reduction
SCALEPACKdata scaling
CNS1.1refinement
PDB_EXTRACT1.701data extraction
MAR345data collection
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 2F3Y

2f3y


Resolution: 1.6→21.2 Å / Rfactor Rfree error: 0.006 / Data cutoff high absF: 261776528 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.272 1827 9.9 %RANDOM
Rwork0.219 ---
all0.219 20733 --
obs0.219 18494 89.2 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 37.273 Å2 / ksol: 0.354 e/Å3
Displacement parametersBiso mean: 29.4 Å2
Baniso -1Baniso -2Baniso -3
1--5.92 Å20 Å2-3.29 Å2
2--10.87 Å20 Å2
3----4.95 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.27 Å0.21 Å
Luzzati d res low-5 Å
Luzzati sigma a0.14 Å0.15 Å
Refinement stepCycle: LAST / Resolution: 1.6→21.2 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1303 0 4 173 1480
Refine LS restraints
Refine-IDTypeDev idealWeight
X-RAY DIFFRACTIONc_bond_d0.005
X-RAY DIFFRACTIONc_angle_deg1
X-RAY DIFFRACTIONc_dihedral_angle_d18.5
X-RAY DIFFRACTIONc_improper_angle_d0.66
X-RAY DIFFRACTIONc_mcbond_it2.91.5
X-RAY DIFFRACTIONc_mcangle_it3.252
X-RAY DIFFRACTIONc_scbond_it2.162
X-RAY DIFFRACTIONc_scangle_it3.272.5
LS refinement shellResolution: 1.6→1.7 Å / Rfactor Rfree error: 0.022 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.34 231 10.3 %
Rwork0.302 2008 -
obs-2239 65.5 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein.topprotein_rep.param
X-RAY DIFFRACTION2water.topwater_rep.param
X-RAY DIFFRACTION3ion.topion.param

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