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1pyt

TERNARY COMPLEX OF PROCARBOXYPEPTIDASE A, PROPROTEINASE E, AND CHYMOTRYPSINOGEN C

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

PROCARBOXYPEPTIDASE A

OrganismNot specified

UniProt P00730

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 4 PROPROTEINASE E × 1 （P05805） CHYMOTRYPSINOGEN C × 1 ZINC ION × 1 CALCIUM ION × 1 water × 4 Consistent with protein count

Other States of the Same Protein in the Database

Monomer
1arl 1arm 1bav 1bav 1bav 1bav 1cbx 1cps 1cpx 1ee3 1ell 1elm

39 assemblies; showing the first 12

Homodimer

None

Homotetramer

None

Other homooligomers
3fvl 3fx6

2 assemblies

Heteromeric or nucleic-acid complex
1pyt 1zlh 2abz 4cpa 4cpa

5 assemblies

View Construct and Data Evidence
UniProt name CBPA1_BOVIN
Isoform —
PDB entities 1, 2
Chains and sequence ranges Author chain A； PDBConstruct 1–94； UniProt 17–110 Author chain B； PDBConstruct 1–309； UniProt 111–419

PROPROTEINASE E

OrganismNot specified

UniProt P05805

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 4 PROCARBOXYPEPTIDASE A × 1 （P00730） PROCARBOXYPEPTIDASE A × 1 （P00730） CHYMOTRYPSINOGEN C × 1 ZINC ION × 1 CALCIUM ION × 1 water × 4 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer
1fon

1 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1pyt

1 assemblies

View Construct and Data Evidence
UniProt name CAC3_BOVIN
Isoform —
PDB entities 3
Chains and sequence ranges Author chain C； PDBConstruct 1–253； UniProt 1–253

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_id1pyt
Deposition date deposition_date1995-06-21
Structure title titleTERNARY COMPLEX OF PROCARBOXYPEPTIDASE A, PROPROTEINASE E, AND CHYMOTRYPSINOGEN C
Keywords keywordsTERNARY COMPLEX (ZYMOGEN), SERINE PROTEINASE, C-TERMINAL PEPTIDASE; TERNARY COMPLEX (ZYMOGEN)
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.

1pyt__assembly_1__model_1

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

Download this curve (.dat)

1pyt__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

1pyt__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）31.43 Å
Rg (electron density)30.69 Å
Total Rg31.35 Å
Atom count7030
Residues902
Excluded volume124310 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1pyt__assembly_1__model_1 tetrameric （4） 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 (7)

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6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd1pyta_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.58 — Ferredoxin-like
Superfamily Superfamily superfamilyd.58.3 — Protease propeptides/inhibitors
Family Family familyd.58.3.1 — Pancreatic carboxypeptidase, activation domain
Domain ID domain_idd1pytb_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.56 — Phosphorylase/hydrolase-like
Superfamily Superfamily superfamilyc.56.5 — Zn-dependent exopeptidases
Family Family familyc.56.5.1 — Pancreatic carboxypeptidases
Domain ID domain_idd1pytc_
Class classb — All beta proteins
Fold Fold foldb.47 — Trypsin-like serine proteases
Superfamily Superfamily superfamilyb.47.1 — Trypsin-like serine proteases
Family Family familyb.47.1.2 — Eukaryotic proteases
Domain ID domain_idd1pytd_
Class classb — All beta proteins
Fold Fold foldb.47 — Trypsin-like serine proteases
Superfamily Superfamily superfamilyb.47.1 — Trypsin-like serine proteases
Family Family familyb.47.1.2 — Eukaryotic proteases

CATH v4.4 (6 domains)

Domain ID domain_id1pytA00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily340 — Metallocarboxypeptidase-like
Domain ID domain_id1pytB00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology630 — Aminopeptidase
Homologous superfamily homologous superfamily10 — Zn peptidases
Domain ID domain_id1pytC01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id1pytC02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id1pytD01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id1pytD02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
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7. Citations (2)