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1a0a

PHOSPHATE SYSTEM POSITIVE REGULATORY PROTEIN PHO4/DNA COMPLEX

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

PROTEIN (PHOSPHATE SYSTEM POSITIVE REGULATORY PROTEIN PHO4)

Saccharomyces cerevisiae

UniProt P07270

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(*CP*TP*CP*AP*CP*AP*CP*GP*TP*GP*GP*GP*AP*CP*TP*AP*G )-3') ; × 1 ;DNA (5'-D(*CP*TP*AP*GP*TP*CP*CP*CP*AP*CP*GP*TP*GP*TP*GP*AP*G )-3') ; × 1 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
1a0a 3w3x 9d45

3 assemblies

View Construct and Data Evidence
UniProt name PHO4_YEAST
Isoform —
PDB entities 3
Chains and sequence ranges Author chain A； PDBConstruct 1–63； UniProt 250–312 Author chain B； PDBConstruct 1–63； UniProt 250–312

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_id1a0a
Deposition date deposition_date1997-11-27
Structure title titlePHOSPHATE SYSTEM POSITIVE REGULATORY PROTEIN PHO4/DNA COMPLEX
Keywords keywordsTRANSCRIPTION FACTOR, BASIC HELIX LOOP HELIX, COMPLEX (TRANSCRIPTION FACTOR-DNA), TRANSCRIPTION-DNA COMPLEX; TRANSCRIPTION/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.

1a0a__assembly_1__model_1

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

Download this curve (.dat)

1a0a__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.

1a0a__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）20.28 Å
Rg (electron density)19.58 Å
Total Rg20.24 Å
Atom count1687
Residues160
Excluded volume27466 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1a0a__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 (4)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1a0aa_
Class classa — All alpha proteins
Fold Fold folda.38 — HLH-like
Superfamily Superfamily superfamilya.38.1 — HLH, helix-loop-helix DNA-binding domain
Family Family familya.38.1.1 — HLH, helix-loop-helix DNA-binding domain
Domain ID domain_idd1a0ab_
Class classa — All alpha proteins
Fold Fold folda.38 — HLH-like
Superfamily Superfamily superfamilya.38.1 — HLH, helix-loop-helix DNA-binding domain
Family Family familya.38.1.1 — HLH, helix-loop-helix DNA-binding domain

CATH v4.4 (2 domains)

Domain ID domain_id1a0aA00
Class class4 — Few Secondary Structures
Architecture architecture10 — Irregular
Topology topology280 — MYOD Basic-Helix-Loop-Helix Domain, subunit B
Homologous superfamily homologous superfamily10 — Helix-loop-helix DNA-binding domain
Domain ID domain_id1a0aB00
Class class4 — Few Secondary Structures
Architecture architecture10 — Irregular
Topology topology280 — MYOD Basic-Helix-Loop-Helix Domain, subunit B
Homologous superfamily homologous superfamily10 — Helix-loop-helix DNA-binding domain
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7. Citations (1)