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1xkq

Crystal Structure of Short-Chain Dehydrogenase/Reductase of unknown Function from Caenorhabditis Elegans with Cofactor

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

short-chain reductase family member (5D234)

Caenorhabditis elegans

UniProt Q9N5G4

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein homooligomer Homooligomer Protein 4 NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 4 water × 4 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer
1xkq

1 assemblies

Other homooligomers

None

Heteromeric or nucleic-acid complex

None

View Construct and Data Evidence
UniProt name Q9N5G4_CAEEL
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–280； UniProt 1–280 Author chain B； PDBConstruct 1–280； UniProt 1–280 Author chain C； PDBConstruct 1–280； UniProt 1–280 Author chain D； PDBConstruct 1–280； UniProt 1–280

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_id1xkq
Deposition date deposition_date2004-09-29
Structure title titleCrystal Structure of Short-Chain Dehydrogenase/Reductase of unknown Function from Caenorhabditis Elegans with Cofactor
Keywords keywords;Parrallel beta-sheet of seven strands in the order 3214567; three alpha-helices on either side of beta-sheet; seventh alpha-helix on top of beta-sheet, Structural Genomics, PSI, Protein Structure Initiative, Southeast Collaboratory for Structural Genomics, SECSG, UNKNOWN FUNCTION ;; UNKNOWN FUNCTION
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.

1xkq__assembly_1__model_1

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

Download this curve (.dat)

1xkq__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.

1xkq__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）29.94 Å
Rg (electron density)28.83 Å
Total Rg29.59 Å
Atom count8327
Residues1085
Excluded volume147970 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1xkq__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) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd1xkqa_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.2 — NAD(P)-binding Rossmann-fold domains
Superfamily Superfamily superfamilyc.2.1 — NAD(P)-binding Rossmann-fold domains
Family Family familyc.2.1.2 — Tyrosine-dependent oxidoreductases
Domain ID domain_idd1xkqb_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.2 — NAD(P)-binding Rossmann-fold domains
Superfamily Superfamily superfamilyc.2.1 — NAD(P)-binding Rossmann-fold domains
Family Family familyc.2.1.2 — Tyrosine-dependent oxidoreductases
Domain ID domain_idd1xkqc_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.2 — NAD(P)-binding Rossmann-fold domains
Superfamily Superfamily superfamilyc.2.1 — NAD(P)-binding Rossmann-fold domains
Family Family familyc.2.1.2 — Tyrosine-dependent oxidoreductases
Domain ID domain_idd1xkqd_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.2 — NAD(P)-binding Rossmann-fold domains
Superfamily Superfamily superfamilyc.2.1 — NAD(P)-binding Rossmann-fold domains
Family Family familyc.2.1.2 — Tyrosine-dependent oxidoreductases

CATH v4.4 (4 domains)

Domain ID domain_id1xkqA00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily720 — NAD(P)-binding Rossmann-like Domain
Domain ID domain_id1xkqB00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily720 — NAD(P)-binding Rossmann-like Domain
Domain ID domain_id1xkqC00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily720 — NAD(P)-binding Rossmann-like Domain
Domain ID domain_id1xkqD00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily720 — NAD(P)-binding Rossmann-like Domain
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7. Citations (1)