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1akh

MAT A1/ALPHA2/DNA TERNARY COMPLEX

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

PROTEIN (MATING-TYPE PROTEIN A-1)

Saccharomyces cerevisiae

UniProt P01366

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Heteromer Protein 2 DNA 2 ;DNA (5'-D(*TP*AP*CP*AP*TP*GP*TP*AP*AP*AP*AP*AP*TP*TP*TP*AP*C P*AP*TP*CP*A)-3') ; × 1 ;DNA (5'-D(*TP*AP*TP*GP*AP*TP*GP*TP*AP*AP*AP*TP*TP*TP*TP*TP*A P*CP*AP*TP*G)-3') ; × 1 PROTEIN (MATING-TYPE PROTEIN ALPHA-2) × 1 （Q6B2C0） water × 4 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer
1f43

1 assemblies

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1akh 1le8 1mh3 1mh4 1yrn

5 assemblies

View Construct and Data Evidence
UniProt name MATA1_YEAST
Isoform —
PDB entities 3
Chains and sequence ranges Author chain A； PDBConstruct 1–61； UniProt 66–126

PROTEIN (MATING-TYPE PROTEIN ALPHA-2)

Saccharomyces cerevisiae

UniProt Q6B2C0

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Heteromer Protein 2 DNA 2 ;DNA (5'-D(*TP*AP*CP*AP*TP*GP*TP*AP*AP*AP*AP*AP*TP*TP*TP*AP*C P*AP*TP*CP*A)-3') ; × 1 ;DNA (5'-D(*TP*AP*TP*GP*AP*TP*GP*TP*AP*AP*AP*TP*TP*TP*TP*TP*A P*CP*AP*TP*G)-3') ; × 1 PROTEIN (MATING-TYPE PROTEIN A-1) × 1 （P01366） water × 4 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 4
Chains and sequence ranges Author chain B； 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_id1akh
Deposition date deposition_date1997-05-19
Structure title titleMAT A1/ALPHA2/DNA TERNARY COMPLEX
Keywords keywords;COMPLEX (TWO DNA-BINDING PROTEINS-DNA), COMPLEX, DNA-BINDING PROTEIN, DNA, TRANSCRIPTION REGULATION, 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.

1akh__assembly_1__model_1

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

Download this curve (.dat)

1akh__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.

1akh__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）20.79 Å
Rg (electron density)20.05 Å
Total Rg20.77 Å
Atom count1854
Residues169
Excluded volume30493 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1akh__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 (5)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1akha_
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_idd1akhb_
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_id1akhA00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily60 — Homeodomain-like
Domain ID domain_id1akhB00
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 (4)