2zzl

Structure of bacteriorhodopsin's M intermediate at pH 7

Method: X-RAY DIFFRACTION Dmax: 70.8 Å Quality: GOOD

1. Protein Identity and Related Structures Protein Identity & Related Structures

Bacteriorhodopsin

OrganismNot specified

UniProt P02945

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Other combination Homooligomer Protein × 3 其他Polymer 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain A; UniProt 1–262 Not recorded 3-O-sulfo-beta-D-galactopyranose-(1-6)-alpha-D-mannopyranose-(1-2)-alpha-D-glucopyranose × 3 RET RETINAL × 3 L3P 2,3-DI-O-PHYTANLY-3-SN-GLYCERO-1-PHOSPHORYL-3'-SN-GLYCEROL-1'-PHOSPHATE × 3 L2P 2,3-DI-PHYTANYL-GLYCEROL × 3 L1P 3-PHOSPHORYL-[1,2-DI-PHYTANYL]GLYCEROL × 9 SOG octyl 1-thio-beta-D-glucopyranoside × 3 X-RAY DIFFRACTION X-ray crystallization conditions:Membrane fusion method;pH 5.2;293 K;2.2M ammonium sulfate, 0.1M sodium citrate, 0.16M potasium chloride, 3M ammonium sulfate, 0.1M HEPES pH 7, liquid propane, Membrane fusion method, temperature 293K Resolution 2.03 Å R-free 0.238

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

173 other PDB entries and 201 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name BACR_HALSA
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–262; UniProt 1–262

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 2zzl

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 2zzl
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2. Structure Basics 2. Structure Basics

Entry ID entry_id2zzl
Deposition date deposition_date2009-02-18
Structure title titleStructure of bacteriorhodopsin's M intermediate at pH 7
Keywords keywords;retinal, protein-lipid complex, reaction intermediate, Cell membrane, Chromophore, Hydrogen ion transport, Ion transport, Membrane, Photoreceptor protein, Pyrrolidone carboxylic acid, Receptor, Retinal protein, Sensory transduction, Transmembrane, Transport, PROTON TRANSPORT ;; PROTON TRANSPORT
Experimental Method methodX-RAY DIFFRACTION

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier20.14
Radius of gyration Rg (electron density) rg_electron19.38
Forward intensity I(0) i09808900.00
Molecular weight molecular_weight29702.0 kDa
Excluded volume excluded_volume40015 ų
Envelope volume envelope_volume44672 ų
Hydration-shell volume shell_volume19296 ų
Envelope diameter envelope_diameter73.3
Shell Rg shell_rg25.80
Envelope Rg envelope_rg20.21
Shape Rg shape_rg19.27
Total Rg total_rg21.00
Total atoms total_atoms2087
Residues n_residues228
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax70.8
Rg (real space) rg_real20.19
Rg uncertainty (real space) rg_real_error0.56
I(0) (real space) i0_real9.8090e+06
I(0) uncertainty (real space) i0_real_error1.3170e+05
Rg (reciprocal space) rg_reciprocal20.18
I(0) (reciprocal space) i0_reciprocal9809000.0000
Solution quality estimate total_estimate0.7810
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary21.2
Skewness Skewness skewness0.390
Kurtosis Kurtosis kurtosis-0.380
Angular range angular_range— – 0.3950 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha2054000.0000
Real-space data points n_real_points71
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.751; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.896; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (8)

7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd2zzla_
Class classf — Membrane and cell surface proteins and peptides
Fold Fold foldf.13 — Class A G protein-coupled receptor (GPCR)-like
Superfamily Superfamily superfamilyf.13.1 — Class A G protein-coupled receptor (GPCR)-like
Family Family familyf.13.1.1 — Bacteriorhodopsin-like

CATH v4.4 (1 domains)

Domain ID domain_id2zzlA00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology1070 — Rhopdopsin 7-helix transmembrane proteins
Homologous superfamily homologous superfamily10 — Rhodopsin 7-helix transmembrane proteins

8. Citations (1)

9. Files and Curves (10)