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1apl

CRYSTAL STRUCTURE OF A MAT-ALPHA2 HOMEODOMAIN-OPERATOR COMPLEX SUGGESTS A GENERAL MODEL FOR HOMEODOMAIN-DNA INTERACTIONS

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

PROTEIN (MAT-ALPHA2 HOMEODOMAIN)

Saccharomyces cerevisiae

UniProt Q6B2C0

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Homooligomer Protein 2 DNA 2 ;DNA (5'-D(*AP*CP*AP*TP*GP*TP*AP*AP*TP*TP*CP*AP*TP*TP*TP*AP*C P*AP*CP*GP*C)-3') ; × 1 ;DNA (5'-D(*TP*GP*CP*GP*TP*GP*TP*AP*AP*AP*TP*GP*AP*AP*TP*TP*A P*CP*AP*TP*G)-3') ; × 1 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1akh 1apl 1mnm 1yrn

4 assemblies

View Construct and Data Evidence
UniProt name MTAL2_YEAST
Isoform —
PDB entities 3
Chains and sequence ranges Author chain C； PDBConstruct 1–83； UniProt 128–210 Author chain D； PDBConstruct 1–83； UniProt 128–210

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_id1apl
Deposition date deposition_date1993-10-04
Structure title titleCRYSTAL STRUCTURE OF A MAT-ALPHA2 HOMEODOMAIN-OPERATOR COMPLEX SUGGESTS A GENERAL MODEL FOR HOMEODOMAIN-DNA INTERACTIONS
Keywords keywordsPROTEIN-DNA COMPLEX, DOUBLE HELIX, DNA BINDING PROTEIN-DNA COMPLEX; DNA BINDING PROTEIN/DNA
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.

1apl__assembly_1__model_1

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

Download this curve (.dat)

1apl__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.

1apl__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）23.19 Å
Rg (electron density)23.25 Å
Total Rg23.77 Å
Atom count1791
Residues159
Excluded volume29006 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1apl__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 (3)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1aplc_
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.1 — Homeodomain-like
Family Family familya.4.1.1 — Homeodomain
Domain ID domain_idd1apld_
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.1 — Homeodomain-like
Family Family familya.4.1.1 — Homeodomain

CATH v4.4 (2 domains)

Domain ID domain_id1aplC00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily60 — Homeodomain-like
Domain ID domain_id1aplD00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily60 — Homeodomain-like
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7. Citations (2)