1qab

The structure of human retinol binding protein with its carrier protein transthyretin reveals interaction with the carboxy terminus of RBP

Method: X-RAY DIFFRACTION Dmax: 119.7 Å Quality: GOOD

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

PROTEIN (transthyretin)

OrganismNot specified

UniProt P02766

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 6 PDB declaration: hexameric(6) Consistent with protein copy count Chain A; UniProt 21–147 Chain B; UniProt 21–147 Chain C; UniProt 21–147 Chain D; UniProt 21–147 Not recorded PROTEIN (retinol binding protein) × 2 (P02753) RTL RETINOL × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.4;293 K;pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K Resolution 3.20 Å R-free 0.403

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.

460 other PDB entries and 501 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name TTHY_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–127; UniProt 21–147 Author chain B; PDBConstruct 1–127; UniProt 21–147 Author chain C; PDBConstruct 1–127; UniProt 21–147 Author chain D; PDBConstruct 1–127; UniProt 21–147

PROTEIN (retinol binding protein)

OrganismNot specified

UniProt P02753

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 6 PDB declaration: hexameric(6) Consistent with protein copy count Chain E; UniProt 24–201 Chain F; UniProt 24–201 Not recorded PROTEIN (transthyretin) × 4 (P02766) RTL RETINOL × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.4;293 K;pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K Resolution 3.20 Å R-free 0.403

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.

22 other PDB entries and 26 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name RET4_HUMAN
Isoform
PDB entities 2
Chains and sequence ranges Author chain E; PDBConstruct 3–180; UniProt 24–201 Author chain F; PDBConstruct 3–180; UniProt 24–201

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 1qab

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1qab
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1qab
Deposition date deposition_date1999-02-03
Structure title titleThe structure of human retinol binding protein with its carrier protein transthyretin reveals interaction with the carboxy terminus of RBP
Keywords keywordshuman serum retinol binding protein, transthyretin, prealbumin, TRANSPORT PROTEIN; TRANSPORT PROTEIN
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier33.72
Radius of gyration Rg (electron density) rg_electron33.14
Forward intensity I(0) i0130433000.00
Molecular weight molecular_weight91472.0 kDa
Excluded volume excluded_volume114420 ų
Envelope volume envelope_volume147520 ų
Hydration-shell volume shell_volume39678 ų
Envelope diameter envelope_diameter127.9
Shell Rg shell_rg37.27
Envelope Rg envelope_rg33.22
Shape Rg shape_rg33.12
Total Rg total_rg33.52
Total atoms total_atoms6454
Residues n_residues820
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 dmax119.7
Rg (real space) rg_real33.95
Rg uncertainty (real space) rg_real_error1.28
I(0) (real space) i0_real1.3040e+08
I(0) uncertainty (real space) i0_real_error2.1280e+06
Rg (reciprocal space) rg_reciprocal33.81
I(0) (reciprocal space) i0_reciprocal130400000.0000
Solution quality estimate total_estimate0.8119
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary38.2
Skewness Skewness skewness0.641
Kurtosis Kurtosis kurtosis0.207
Angular range angular_range— – 0.2350 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha37880000.0000
Real-space data points n_real_points48
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.693; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.816; Smooth: 0.654

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_idd1qaba_
Class classb — All beta proteins
Fold Fold foldb.3 — Prealbumin-like
Superfamily Superfamily superfamilyb.3.4 — Transthyretin (synonym: prealbumin)
Family Family familyb.3.4.1 — Transthyretin (synonym: prealbumin)
Domain ID domain_idd1qabb_
Class classb — All beta proteins
Fold Fold foldb.3 — Prealbumin-like
Superfamily Superfamily superfamilyb.3.4 — Transthyretin (synonym: prealbumin)
Family Family familyb.3.4.1 — Transthyretin (synonym: prealbumin)
Domain ID domain_idd1qabc_
Class classb — All beta proteins
Fold Fold foldb.3 — Prealbumin-like
Superfamily Superfamily superfamilyb.3.4 — Transthyretin (synonym: prealbumin)
Family Family familyb.3.4.1 — Transthyretin (synonym: prealbumin)
Domain ID domain_idd1qabd_
Class classb — All beta proteins
Fold Fold foldb.3 — Prealbumin-like
Superfamily Superfamily superfamilyb.3.4 — Transthyretin (synonym: prealbumin)
Family Family familyb.3.4.1 — Transthyretin (synonym: prealbumin)
Domain ID domain_idd1qabe_
Class classb — All beta proteins
Fold Fold foldb.60 — Lipocalins
Superfamily Superfamily superfamilyb.60.1 — Lipocalins
Family Family familyb.60.1.1 — Retinol binding protein-like
Domain ID domain_idd1qabf_
Class classb — All beta proteins
Fold Fold foldb.60 — Lipocalins
Superfamily Superfamily superfamilyb.60.1 — Lipocalins
Family Family familyb.60.1.1 — Retinol binding protein-like

CATH v4.4 (6 domains)

Domain ID domain_id1qabA00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily180 — Transthyretin/hydroxyisourate hydrolase domain
Domain ID domain_id1qabB00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily180 — Transthyretin/hydroxyisourate hydrolase domain
Domain ID domain_id1qabC00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily180 — Transthyretin/hydroxyisourate hydrolase domain
Domain ID domain_id1qabD00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily180 — Transthyretin/hydroxyisourate hydrolase domain
Domain ID domain_id1qabE00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily20 — Calycin beta-barrel core domain
Domain ID domain_id1qabF00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily20 — Calycin beta-barrel core domain

8. Citations (1)

9. Files and Curves (10)