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- PDB-2n6a: NMR structure of a human calmodulin/connexin-36 peptide hybrid -

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Basic information

Entry
Database: PDB / ID: 2n6a
TitleNMR structure of a human calmodulin/connexin-36 peptide hybrid
Componentshuman calmodulin/connexin-36 peptide hybrid
KeywordsSIGNALING PROTEIN / calmodulin / calcium binding / gap junction / chimera
Function / homology
Function and homology information


Electric Transmission Across Gap Junctions / connexin complex / : / establishment of protein localization to mitochondrial membrane / Gap junction assembly / gap junction channel activity / type 3 metabotropic glutamate receptor binding / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers ...Electric Transmission Across Gap Junctions / connexin complex / : / establishment of protein localization to mitochondrial membrane / Gap junction assembly / gap junction channel activity / type 3 metabotropic glutamate receptor binding / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / regulation of synaptic vesicle endocytosis / Calmodulin induced events / Reduction of cytosolic Ca++ levels / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Activation of Ca-permeable Kainate Receptor / Loss of phosphorylation of MECP2 at T308 / 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) / positive regulation of cyclic-nucleotide phosphodiesterase activity / organelle localization by membrane tethering / negative regulation of calcium ion export across plasma membrane / regulation of synaptic vesicle exocytosis / CLEC7A (Dectin-1) induces NFAT activation / regulation of cardiac muscle cell action potential / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / Activation of RAC1 downstream of NMDARs / response to corticosterone / nitric-oxide synthase binding / positive regulation of ryanodine-sensitive calcium-release channel activity / regulation of cell communication by electrical coupling involved in cardiac conduction / Negative regulation of NMDA receptor-mediated neuronal transmission / negative regulation of peptidyl-threonine phosphorylation / Synthesis of IP3 and IP4 in the cytosol / Unblocking of NMDA receptors, glutamate binding and activation / Phase 0 - rapid depolarisation / protein phosphatase activator activity / RHO GTPases activate PAKs / positive regulation of phosphoprotein phosphatase activity / Ion transport by P-type ATPases / Long-term potentiation / Uptake and function of anthrax toxins / Calcineurin activates NFAT / Regulation of MECP2 expression and activity / adenylate cyclase binding / catalytic complex / DARPP-32 events / detection of calcium ion / regulation of cardiac muscle contraction / negative regulation of ryanodine-sensitive calcium-release channel activity / Smooth Muscle Contraction / neuronal action potential / RHO GTPases activate IQGAPs / calcium channel inhibitor activity / cellular response to interferon-beta / positive regulation of DNA binding / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / Protein methylation / phosphatidylinositol 3-kinase binding / eNOS activation / Activation of AMPK downstream of NMDARs / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / enzyme regulator activity / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / positive regulation of protein dephosphorylation / Ion homeostasis / regulation of calcium-mediated signaling / regulation of ryanodine-sensitive calcium-release channel activity / titin binding / positive regulation of protein autophosphorylation / voltage-gated potassium channel complex / sperm midpiece / calcium channel complex / response to amphetamine / activation of adenylate cyclase activity / substantia nigra development / adenylate cyclase activator activity / visual perception / Ras activation upon Ca2+ influx through NMDA receptor / nitric-oxide synthase regulator activity / regulation of heart rate / sarcomere / protein serine/threonine kinase activator activity / FCERI mediated Ca+2 mobilization / FCGR3A-mediated IL10 synthesis / VEGFR2 mediated vascular permeability / positive regulation of peptidyl-threonine phosphorylation / regulation of cytokinesis / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / VEGFR2 mediated cell proliferation / positive regulation of nitric-oxide synthase activity / Translocation of SLC2A4 (GLUT4) to the plasma membrane / mitochondrial membrane / positive regulation of receptor signaling pathway via JAK-STAT / RAF activation / Transcriptional activation of mitochondrial biogenesis / positive regulation of protein serine/threonine kinase activity
Similarity search - Function
Gap junction delta-2 protein (Cx36) / Connexin / Connexin, N-terminal / Connexin, conserved site / Gap junction protein, cysteine-rich domain / Connexin, N-terminal domain superfamily / Connexin / Connexins signature 1. / Connexins signature 2. / Connexin homologues ...Gap junction delta-2 protein (Cx36) / Connexin / Connexin, N-terminal / Connexin, conserved site / Gap junction protein, cysteine-rich domain / Connexin, N-terminal domain superfamily / Connexin / Connexins signature 1. / Connexins signature 2. / Connexin homologues / Gap junction channel protein cysteine-rich domain / 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 / EF-hand domain pair
Similarity search - Domain/homology
Calmodulin-1 / Calmodulin-3 / Gap junction delta-2 protein
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodSOLUTION NMR / simulated annealing
AuthorsDonaldson, L.
CitationJournal: To be Published
Title: An investigation of calcium mediate signaling by the Connexin 36 gap junction protein
Authors: Donaldson, L.
History
DepositionAug 14, 2015Deposition site: BMRB / Processing site: RCSB
Revision 1.0Aug 26, 2015Provider: repository / Type: Initial release
Revision 1.1Apr 27, 2016Group: Structure summary
Revision 1.2Jun 14, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Other
Category: database_2 / pdbx_database_status ...database_2 / pdbx_database_status / pdbx_nmr_spectrometer / 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_database_status.status_code_nmr_data / _pdbx_nmr_spectrometer.model / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_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_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_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_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 1.3May 15, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2 / Item: _database_2.pdbx_DOI

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: human calmodulin/connexin-36 peptide hybrid
hetero molecules


Theoretical massNumber of molelcules
Total (without water)19,6415
Polymers19,4811
Non-polymers1604
Water00
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
NMR ensembles
DataCriteria
Number of conformers (submitted / calculated)18 / 400structures with the lowest energy
RepresentativeModel #1lowest energy

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Components

#1: Protein human calmodulin/connexin-36 peptide hybrid / CaM / GJD2 / Connexin-36 / Cx36 / Gap junction alpha-9 protein


Mass: 19480.545 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Plasmid: pD441 / Production host: Escherichia coli (E. coli)
References: UniProt: P62158, UniProt: Q9UKL4, UniProt: P0DP23*PLUS
#2: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Ca

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Experimental details

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Experiment

ExperimentMethod: SOLUTION NMR
NMR experiment
Conditions-IDExperiment-IDSolution-IDType
1112D 1H-15N HSQC
1212D 1H-13C HSQC aliphatic
1312D 1H-13C HSQC aromatic
1413D CBCA(CO)NH
1513D C(CO)NH
1613D HNCO
1713D HNCA
1813D HN(CA)CB
1913D H(CCO)NH
11013D (H)CCH-TOCSY
11113D 1H-15N NOESY
11213D 1H-13C NOESY aliphatic
11313D 1H-13C NOESY aromatic

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Sample preparation

DetailsContents: 2.0 mM [U-99% 13C; U-99% 15N] protein, 0.0005 w/v sodium azide, 25 mM sodium chloride, 5 mM Tris, 90% H2O/10% D2O
Solvent system: 90% H2O/10% D2O
Sample
Conc. (mg/ml)ComponentIsotopic labelingSolution-ID
2.0 mMprotein-1[U-99% 13C; U-99% 15N]1
0.0005 w/vsodium azide-21
25 mMsodium chloride-31
5 mMTris-41
Sample conditionsIonic strength: 0.25 / pH: 7.4 / Pressure: ambient / Temperature: 293 K

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NMR measurement

NMR spectrometerType: Bruker Avance / Manufacturer: Bruker / Model: AVANCE / Field strength: 700 MHz

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Processing

NMR software
NameDeveloperClassification
NMRPipeDelaglio, Grzesiek, Vuister, Zhu, Pfeifer and Baxprocessing
CYANAGuntert, Mumenthaler and Wuthrichstructure solution
CYANAGuntert, Mumenthaler and Wuthrichrefinement
RefinementMethod: simulated annealing / Software ordinal: 1 / Details: 10000 STEPS OF SA USING CYANA3
NMR representativeSelection criteria: lowest energy
NMR ensembleConformer selection criteria: structures with the lowest energy
Conformers calculated total number: 400 / Conformers submitted total number: 18 / Maximum lower distance constraint violation: 0.2 Å / Maximum upper distance constraint violation: 0.2 Å
NMR ensemble rmsDistance rms dev: 0.63 Å / Distance rms dev error: 0.18 Å

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