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1mrk

STUDIES ON CRYSTAL STRUCTURES ACTIVE CENTER GEOMETRY AND DEPURINE MECHANISM OF TWO RIBOSOME-INACTIVATING PROTEINS

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

ALPHA-TRICHOSANTHIN

Trichosanthes kirilowii

UniProt P09989

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein monomer Monomer Protein 1 (1S)-1-(7-amino-1H-pyrazolo[4,3-d]pyrimidin-3-yl)-1,4-anhydro-D-ribitol × 1 water × 1 Consistent with protein count

Other States of the Same Protein in the Database

Monomer
1gis 1giu 1j4g 1j4g 1j4g 1j4g 1mrj 1mrk 1nli 1qd2 1tcs 2jjr

14 assemblies; showing the first 12

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
2jdl 2jdl

2 assemblies

View Construct and Data Evidence
UniProt name RIPT_TRIKI
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–247； UniProt 24–270

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_id1mrk
Deposition date deposition_date1994-07-01
Structure title titleSTUDIES ON CRYSTAL STRUCTURES ACTIVE CENTER GEOMETRY AND DEPURINE MECHANISM OF TWO RIBOSOME-INACTIVATING PROTEINS
Keywords keywordsRIBOSOME-INACTIVATING PROTEIN; RIBOSOME-INACTIVATING PROTEIN
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.

1mrk__assembly_1__model_1

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

Download this curve (.dat)

1mrk__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.

1mrk__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）18.98 Å
Rg (electron density)17.65 Å
Total Rg18.66 Å
Atom count2398
Residues247
Excluded volume34463 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1mrk__assembly_1__model_1 monomeric （1） 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) 3 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd1mrka_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.165 — Ribosome inactivating proteins (RIP)
Superfamily Superfamily superfamilyd.165.1 — Ribosome inactivating proteins (RIP)
Family Family familyd.165.1.1 — Plant cytotoxins

CATH v4.4 (2 domains)

Domain ID domain_id1mrkA01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology420 — Ricin (A subunit); domain 1
Homologous superfamily homologous superfamily10 — Ricin (A subunit), domain 1
Domain ID domain_id1mrkA02
Class class4 — Few Secondary Structures
Architecture architecture10 — Irregular
Topology topology470 — Ricin (A Subunit), domain 2
Homologous superfamily homologous superfamily10 — Ricin (A Subunit), domain 2
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7. Citations (2)