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1f2k

CRYSTAL STRUCTURE OF ACANTHAMOEBA CASTELLANII PROFILIN II, CUBIC CRYSTAL FORM

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

PROFILIN II

Acanthamoeba castellanii

UniProt P19984

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein monomer Monomer Protein 1 water × 1 Consistent with protein count
2 Protein monomer Monomer Protein 1 water × 1 Consistent with protein count

Other States of the Same Protein in the Database

Monomer
1f2k 1f2k 2acg

3 assemblies

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex

None

View Construct and Data Evidence
UniProt name PROF2_ACACA
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–125； UniProt 1–125 Author chain B； PDBConstruct 1–125； UniProt 1–125

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_id1f2k
Deposition date deposition_date2000-05-26
Structure title titleCRYSTAL STRUCTURE OF ACANTHAMOEBA CASTELLANII PROFILIN II, CUBIC CRYSTAL FORM
Keywords keywords;SEVEN-STRANDED INCOMPLETE ANTIPARALLEL UP-AND-DOWN BETA BARREL, ACTIN-BINDING PROTEIN, POLY-L-PROLINE BINDING PROTEIN, PIP2 BINDING PROTEIN, STRUCTURAL PROTEIN ;; STRUCTURAL 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.

1f2k__assembly_1__model_1

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

Download this curve (.dat)

1f2k__assembly_1__model_1 | I(q)

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

1f2k__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）14.47 Å
Rg (electron density)12.97 Å
Total Rg14.29 Å
Atom count914
Residues125
Excluded volume16212 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1f2k__assembly_1__model_1 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 1f2k__assembly_2__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 (2)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1f2ka_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.110 — Profilin-like
Superfamily Superfamily superfamilyd.110.1 — Profilin (actin-binding protein)
Family Family familyd.110.1.1 — Profilin (actin-binding protein)
Domain ID domain_idd1f2kb_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.110 — Profilin-like
Superfamily Superfamily superfamilyd.110.1 — Profilin (actin-binding protein)
Family Family familyd.110.1.1 — Profilin (actin-binding protein)

CATH v4.4 (2 domains)

Domain ID domain_id1f2kA00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology450 — Beta-Lactamase
Homologous superfamily homologous superfamily30 — Dynein light chain 2a, cytoplasmic
Domain ID domain_id1f2kB00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology450 — Beta-Lactamase
Homologous superfamily homologous superfamily30 — Dynein light chain 2a, cytoplasmic
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7. Citations (6)