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1nkt

CRYSTAL STRUCTURE OF THE SECA PROTEIN TRANSLOCATION ATPASE FROM MYCOBACTERIUM TUBERCULOSIS COMPLEX WITH ADPBS

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

Preprotein translocase secA 1 subunit

Mycobacterium tuberculosis

UniProt P0A5Y8

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein homooligomer Homooligomer Protein 2 MAGNESIUM ION × 2 ADENOSINE-5'-DIPHOSPHATE × 2 water × 2 Consistent with protein count
2 Protein homooligomer Homooligomer Protein 4 MAGNESIUM ION × 4 ADENOSINE-5'-DIPHOSPHATE × 4 water × 4 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer
1nkt 1nl3

2 assemblies

Homotetramer
1nkt 1nl3

2 assemblies

Other homooligomers

None

Heteromeric or nucleic-acid complex

None

View Construct and Data Evidence
UniProt name SECA1_MYCTU
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 32–922； UniProt 2–892 Author chain B； PDBConstruct 32–922； UniProt 2–892

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_id1nkt
Deposition date deposition_date2003-01-03
Structure title titleCRYSTAL STRUCTURE OF THE SECA PROTEIN TRANSLOCATION ATPASE FROM MYCOBACTERIUM TUBERCULOSIS COMPLEX WITH ADPBS
Keywords keywords;PREPROTEIN TRANSLOCATION, ATPASE, TRANSMEMBRANE TRANSPORT, HELICASE-LIKE MOTOR DOMAIN, Structural Genomics, PSI, Protein Structure Initiative, TB Structural Genomics Consortium, TBSGC, PROTEIN TRANSPORT ;; PROTEIN TRANSPORT
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.

1nkt__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1nkt__assembly_2__model_1 | I(q)

10-2 10-1 106 107 108 109 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

1nkt__assembly_2__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）51.42 Å
Rg (electron density)50.86 Å
Total Rg50.95 Å
Atom count26632
Residues3344
Excluded volume471010 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1nkt__assembly_1__model_1 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 1nkt__assembly_2__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) 18 domains

SCOP 2.08 (10 domains)

Domain ID domain_idd1nkta1
Class classa — All alpha proteins
Fold Fold folda.162 — Pre-protein crosslinking domain of SecA
Superfamily Superfamily superfamilya.162.1 — Pre-protein crosslinking domain of SecA
Family Family familya.162.1.1 — Pre-protein crosslinking domain of SecA
Domain ID domain_idd1nkta2
Class classa — All alpha proteins
Fold Fold folda.172 — Helical scaffold and wing domains of SecA
Superfamily Superfamily superfamilya.172.1 — Helical scaffold and wing domains of SecA
Family Family familya.172.1.1 — Helical scaffold and wing domains of SecA
Domain ID domain_idd1nkta3
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamilyc.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family familyc.37.1.19 — Tandem AAA-ATPase domain
Domain ID domain_idd1nkta4
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamilyc.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family familyc.37.1.19 — Tandem AAA-ATPase domain
Domain ID domain_idd1nkta5
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags
Domain ID domain_idd1nktb1
Class classa — All alpha proteins
Fold Fold folda.162 — Pre-protein crosslinking domain of SecA
Superfamily Superfamily superfamilya.162.1 — Pre-protein crosslinking domain of SecA
Family Family familya.162.1.1 — Pre-protein crosslinking domain of SecA
Domain ID domain_idd1nktb2
Class classa — All alpha proteins
Fold Fold folda.172 — Helical scaffold and wing domains of SecA
Superfamily Superfamily superfamilya.172.1 — Helical scaffold and wing domains of SecA
Family Family familya.172.1.1 — Helical scaffold and wing domains of SecA
Domain ID domain_idd1nktb3
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamilyc.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family familyc.37.1.19 — Tandem AAA-ATPase domain
Domain ID domain_idd1nktb4
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamilyc.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family familyc.37.1.19 — Tandem AAA-ATPase domain
Domain ID domain_idd1nktb5
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags

CATH v4.4 (8 domains)

Domain ID domain_id1nktA01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id1nktA02
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology1440 — Pre-protein croslinking domain of SecA
Homologous superfamily homologous superfamily10 — SecA, preprotein cross-linking domain
Domain ID domain_id1nktA03
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id1nktA04
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3060 — Helical scaffold and wing domains of SecA
Homologous superfamily homologous superfamily10 — Helical scaffold and wing domains of SecA
Domain ID domain_id1nktB01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id1nktB02
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology1440 — Pre-protein croslinking domain of SecA
Homologous superfamily homologous superfamily10 — SecA, preprotein cross-linking domain
Domain ID domain_id1nktB03
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id1nktB04
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3060 — Helical scaffold and wing domains of SecA
Homologous superfamily homologous superfamily10 — Helical scaffold and wing domains of SecA
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7. Citations (1)