2p4a

X-ray structure of a camelid affinity matured single-domain vhh antibody fragment in complex with RNASE A

Method: X-RAY DIFFRACTION Dmax: 139.4 Å Quality: REASONABLE

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

Ribonuclease pancreatic

OrganismNot specified

UniProt P61823

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 × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 27–150 Not recorded ANTIBODY CAB-RN05 × 1 SO4 SULFATE ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 5.5;295 K;HAMPTON RESEARCH INDEX SCREEN, SOLUTION #67, pH 5.5, VAPOR DIFFUSION, temperature 295K Resolution 1.90 Å R-free 0.218
2 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain C; UniProt 27–150 Not recorded ANTIBODY CAB-RN05 × 1 SO4 SULFATE ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 5.5;295 K;HAMPTON RESEARCH INDEX SCREEN, SOLUTION #67, pH 5.5, VAPOR DIFFUSION, temperature 295K Resolution 1.90 Å R-free 0.218

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.

333 other PDB entries and 494 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name RNAS1_BOVIN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–124; UniProt 27–150 Author chain C; PDBConstruct 1–124; UniProt 27–150

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 2p4a

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 2p4a
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2. Structure Basics 2. Structure Basics

Entry ID entry_id2p4a
Deposition date deposition_date2007-03-11
Structure title titleX-ray structure of a camelid affinity matured single-domain vhh antibody fragment in complex with RNASE A
Keywords keywordsCAMELID SINGLE-DOMAIN ANTIBODY, VHH, CAB-RN05, RNASE A, PARATOPE, YEAST SURFACE DISPLAY, HYDROLASE-IMMUNE SYSTEM COMPLEX; HYDROLASE/IMMUNE SYSTEM
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier37.27
Radius of gyration Rg (electron density) rg_electron37.94
Forward intensity I(0) i051492300.00
Molecular weight molecular_weight53222.0 kDa
Excluded volume excluded_volume64935 ų
Envelope volume envelope_volume86837 ų
Hydration-shell volume shell_volume22842 ų
Envelope diameter envelope_diameter137.0
Shell Rg shell_rg35.37
Envelope Rg envelope_rg38.56
Shape Rg shape_rg37.86
Total Rg total_rg38.03
Total atoms total_atoms3714
Residues n_residues490
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 dmax139.4
Rg (real space) rg_real38.27
Rg uncertainty (real space) rg_real_error1.91
I(0) (real space) i0_real5.1490e+07
I(0) uncertainty (real space) i0_real_error9.6770e+05
Rg (reciprocal space) rg_reciprocal37.65
I(0) (reciprocal space) i0_reciprocal51460000.0000
Solution quality estimate total_estimate0.6339
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary23.2
Skewness Skewness skewness0.673
Kurtosis Kurtosis kurtosis-0.364
Angular range angular_range— – 0.2100 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha1835000.0000
Real-space data points n_real_points43
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.164; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.063; Smooth: 0.682

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd2p4aa_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.5 — RNase A-like
Superfamily Superfamily superfamilyd.5.1 — RNase A-like
Family Family familyd.5.1.1 — Ribonuclease A-like
Domain ID domain_idd2p4ab_
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.1 — Immunoglobulin
Family Family familyb.1.1.1 — V set domains (antibody variable domain-like)
Domain ID domain_idd2p4ac_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.5 — RNase A-like
Superfamily Superfamily superfamilyd.5.1 — RNase A-like
Family Family familyd.5.1.1 — Ribonuclease A-like
Domain ID domain_idd2p4ad_
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.1 — Immunoglobulin
Family Family familyb.1.1.1 — V set domains (antibody variable domain-like)

CATH v4.4 (4 domains)

Domain ID domain_id2p4aA00
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology130 — P-30 Protein
Homologous superfamily homologous superfamily10 — Ribonuclease A-like domain
Domain ID domain_id2p4aB00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id2p4aC00
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology130 — P-30 Protein
Homologous superfamily homologous superfamily10 — Ribonuclease A-like domain
Domain ID domain_id2p4aD00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins

8. Citations (1)

9. Files and Curves (10)