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2pxp

Variant 13 of Ribonucleoprotein Core of the E. Coli Signal Recognition Particle

Method: X-RAY DIFFRACTION
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Signal recognition particle protein

Escherichia coli

UniProt P0AGD7

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–RNA Monomer Protein 1 RNA 1 4.5 S RNA × 1 COBALT HEXAMMINE(III) × 7 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer
7o9i

1 assemblies

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1dul 2pxb 2pxd 2pxe 2pxf 2pxk 2pxl 2pxp 2pxq 2pxt 2pxu 2pxv

20 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name SRP54_ECOLI
Isoform —
PDB entities 2
Chains and sequence ranges Author chain A； PDBConstruct 1–102； UniProt 329–430

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id2pxp
Deposition date deposition_date2007-05-14
Structure title titleVariant 13 of Ribonucleoprotein Core of the E. Coli Signal Recognition Particle
Keywords keywordsGU PAIR, HEXAMINE, RNA PHASING, RNA, CATION BINDING, SIGNALING PROTEIN-RNA COMPLEX; SIGNALING PROTEIN/RNA
Experimental Method methodX-RAY DIFFRACTION
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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

2pxp__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2pxp__assembly_1__model_1 | I(q)

10-2 10-1 105 106 107 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

2pxp__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）21.58 Å
Rg (electron density)21.25 Å
Total Rg21.80 Å
Atom count1634
Residues110
Excluded volume25426 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 2pxp__assembly_1__model_1 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (3)

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6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd2pxpa_
Class classa — All alpha proteins
Fold Fold folda.36 — Signal peptide-binding domain
Superfamily Superfamily superfamilya.36.1 — Signal peptide-binding domain
Family Family familya.36.1.1 — Signal peptide-binding domain

CATH v4.4 (1 domains)

Domain ID domain_id2pxpA00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology260 — 434 Repressor (Amino-terminal Domain)
Homologous superfamily homologous superfamily30 — Signal recognition particle, SRP54 subunit, M-domain
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7. Citations (1)