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- PDB-6mzb: Cryo-EM structure of phosphodiesterase 6 -

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Basic information

Entry
Database: PDB / ID: 6mzb
TitleCryo-EM structure of phosphodiesterase 6
Components
  • (Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit ...) x 2
  • Retinal rod rhodopsin-sensitive cGMP 3',5'-cyclic phosphodiesterase subunit gamma
KeywordsSIGNALING PROTEIN / GAF domain / phosphohydrolase / G protein-coupled receptor signaling
Function / homology
Function and homology information


3',5'-cyclic-GMP phosphodiesterase / Inactivation, recovery and regulation of the phototransduction cascade / positive regulation of G protein-coupled receptor signaling pathway / Activation of the phototransduction cascade / ion binding / response to stimulus / Ca2+ pathway / positive regulation of epidermal growth factor receptor signaling pathway / photoreceptor outer segment membrane / entrainment of circadian clock by photoperiod ...3',5'-cyclic-GMP phosphodiesterase / Inactivation, recovery and regulation of the phototransduction cascade / positive regulation of G protein-coupled receptor signaling pathway / Activation of the phototransduction cascade / ion binding / response to stimulus / Ca2+ pathway / positive regulation of epidermal growth factor receptor signaling pathway / photoreceptor outer segment membrane / entrainment of circadian clock by photoperiod / 3',5'-cyclic-GMP phosphodiesterase activity / cGMP binding / 3',5'-cyclic-nucleotide phosphodiesterase activity / visual perception / photoreceptor disc membrane / retina development in camera-type eye / positive regulation of MAPK cascade / molecular adaptor activity / signal transduction / zinc ion binding / metal ion binding
Similarity search - Function
Retinal cGMP phosphodiesterase, gamma subunit / Retinal cGMP phosphodiesterase, gamma subunit superfamily / Retinal cGMP phosphodiesterase, gamma subunit / GAF domain / 3'5'-cyclic nucleotide phosphodiesterase / Domain present in phytochromes and cGMP-specific phosphodiesterases. / 3'5'-cyclic nucleotide phosphodiesterase, catalytic domain / 3'5'-cyclic nucleotide phosphodiesterase, conserved site / 3'5'-cyclic nucleotide phosphodiesterase, catalytic domain superfamily / 3'5'-cyclic nucleotide phosphodiesterase ...Retinal cGMP phosphodiesterase, gamma subunit / Retinal cGMP phosphodiesterase, gamma subunit superfamily / Retinal cGMP phosphodiesterase, gamma subunit / GAF domain / 3'5'-cyclic nucleotide phosphodiesterase / Domain present in phytochromes and cGMP-specific phosphodiesterases. / 3'5'-cyclic nucleotide phosphodiesterase, catalytic domain / 3'5'-cyclic nucleotide phosphodiesterase, conserved site / 3'5'-cyclic nucleotide phosphodiesterase, catalytic domain superfamily / 3'5'-cyclic nucleotide phosphodiesterase / 3'5'-cyclic nucleotide phosphodiesterase domain signature. / 3'5'-cyclic nucleotide phosphodiesterase domain profile. / GAF domain / GAF-like domain superfamily / Metal dependent phosphohydrolases with conserved 'HD' motif. / HD/PDEase domain
Similarity search - Domain/homology
GUANOSINE-3',5'-MONOPHOSPHATE / Retinal rod rhodopsin-sensitive cGMP 3',5'-cyclic phosphodiesterase subunit gamma / Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit alpha / Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit beta
Similarity search - Component
Biological speciesBos taurus (cattle)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsGulati, S. / Palczewski, K.
Funding support United States, 3items
OrganizationGrant numberCountry
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)EY009339 United States
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)EY027283 United States
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)EY024864 United States
CitationJournal: Sci Adv / Year: 2019
Title: Cryo-EM structure of phosphodiesterase 6 reveals insights into the allosteric regulation of type I phosphodiesterases.
Authors: Sahil Gulati / Krzysztof Palczewski / Andreas Engel / Henning Stahlberg / Lubomir Kovacik /
Abstract: Cyclic nucleotide phosphodiesterases (PDEs) work in conjunction with adenylate/guanylate cyclases to regulate the key second messengers of G protein-coupled receptor signaling. Previous attempts to ...Cyclic nucleotide phosphodiesterases (PDEs) work in conjunction with adenylate/guanylate cyclases to regulate the key second messengers of G protein-coupled receptor signaling. Previous attempts to determine the full-length structure of PDE family members at high-resolution have been hindered by structural flexibility, especially in their linker regions and N- and C-terminal ends. Therefore, most structure-activity relationship studies have so far focused on truncated and conserved catalytic domains rather than the regulatory domains that allosterically govern the activity of most PDEs. Here, we used single-particle cryo-electron microscopy to determine the structure of the full-length PDE6αβ2γ complex. The final density map resolved at 3.4 Å reveals several previously unseen structural features, including a coiled N-terminal domain and the interface of PDE6γ subunits with the PDE6αβ heterodimer. Comparison of the PDE6αβ2γ complex with the closed state of PDE2A sheds light on the conformational changes associated with the allosteric activation of type I PDEs.
History
DepositionNov 4, 2018Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 6, 2019Provider: repository / Type: Initial release
Revision 1.1Mar 13, 2019Group: Data collection / Database references
Category: citation / citation_author ...citation / citation_author / em_admin / pdbx_database_proc / pdbx_seq_map_depositor_info
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _em_admin.last_update / _pdbx_seq_map_depositor_info.one_letter_code / _pdbx_seq_map_depositor_info.one_letter_code_mod
Revision 1.2Dec 18, 2019Group: Author supporting evidence / Other / Category: atom_sites / pdbx_audit_support
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] ..._atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3] / _pdbx_audit_support.funding_organization
Revision 2.0May 19, 2021Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Derived calculations / Non-polymer description / Refinement description / Structure summary
Category: atom_site / atom_type ...atom_site / atom_type / chem_comp / entity / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_poly_seq_scheme / pdbx_struct_assembly_gen / pdbx_struct_conn_angle / pdbx_struct_sheet_hbond / pdbx_unobs_or_zero_occ_atoms / pdbx_unobs_or_zero_occ_residues / pdbx_validate_close_contact / pdbx_validate_main_chain_plane / pdbx_validate_peptide_omega / pdbx_validate_rmsd_angle / pdbx_validate_torsion / refine_ls_restr / software / struct_asym / struct_conf / struct_conn / struct_conn_type / struct_sheet / struct_sheet_order / struct_sheet_range / struct_site / struct_site_gen
Item: _chem_comp.formula / _chem_comp.formula_weight ..._chem_comp.formula / _chem_comp.formula_weight / _chem_comp.id / _chem_comp.mon_nstd_flag / _chem_comp.name / _chem_comp.type / _pdbx_poly_seq_scheme.auth_mon_id / _pdbx_poly_seq_scheme.auth_seq_num / _pdbx_poly_seq_scheme.pdb_mon_id / _pdbx_struct_assembly_gen.asym_id_list / _software.version / _struct_sheet.number_strands

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Structure visualization

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Assembly

Deposited unit
B: Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit beta
A: Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit alpha
C: Retinal rod rhodopsin-sensitive cGMP 3',5'-cyclic phosphodiesterase subunit gamma
D: Retinal rod rhodopsin-sensitive cGMP 3',5'-cyclic phosphodiesterase subunit gamma
hetero molecules


Theoretical massNumber of molelcules
Total (without water)218,15010
Polymers217,2804
Non-polymers8706
Water0
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area18280 Å2
ΔGint-107 kcal/mol
Surface area85370 Å2
MethodPISA

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Components

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Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit ... , 2 types, 2 molecules BA

#1: Protein Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit beta / GMP-PDE beta


Mass: 98449.648 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bos taurus (cattle) / Tissue: Retina / Gene: PDE6B, PDEB / Organ: Eye / Production host: Bos taurus (cattle)
References: UniProt: P23439, 3',5'-cyclic-GMP phosphodiesterase
#2: Protein Rod cGMP-specific 3',5'-cyclic phosphodiesterase subunit alpha / GMP-PDE alpha / PDE V-B1


Mass: 99461.789 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bos taurus (cattle) / Tissue: Retina / Gene: PDE6A, PDEA / Organ: Eye / Production host: Bos taurus (cattle)
References: UniProt: P11541, 3',5'-cyclic-GMP phosphodiesterase

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Protein , 1 types, 2 molecules CD

#3: Protein Retinal rod rhodopsin-sensitive cGMP 3',5'-cyclic phosphodiesterase subunit gamma / GMP-PDE gamma


Mass: 9684.229 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bos taurus (cattle) / Tissue: Retina / Gene: PDE6G, PDEG / Organ: Eye / Production host: Bos taurus (cattle)
References: UniProt: P04972, 3',5'-cyclic-GMP phosphodiesterase

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Non-polymers , 3 types, 6 molecules

#4: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn
#5: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Mg
#6: Chemical ChemComp-35G / GUANOSINE-3',5'-MONOPHOSPHATE / Guanosine monophosphate


Mass: 345.205 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H12N5O7P

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Phosphodiesterase 6 / Type: COMPLEX / Entity ID: #1-#3 / Source: NATURAL
Source (natural)Organism: Bos taurus (cattle)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid type: Quantifoil R2/2
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 80 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.19.2_4158: / Classification: refinement
CTF correctionType: NONE
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 43597 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00214384
ELECTRON MICROSCOPYf_angle_d0.8119448
ELECTRON MICROSCOPYf_dihedral_angle_d7.3281905
ELECTRON MICROSCOPYf_chiral_restr0.0712121
ELECTRON MICROSCOPYf_plane_restr0.0042534

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