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1kju

Ca2+-ATPase in the E2 State

Method: ELECTRON MICROSCOPY
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Sarcoplasmic/endoplasmic reticulum calcium ATPase 1a

OrganismNot specified

UniProt P04191

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein monomer Monomer Protein 1 No other associated polymer Consistent with protein count

Other States of the Same Protein in the Database

Monomer
1kju 1su4 1t5s 1t5t 1xp5 2by4 2c88 2c8k 2c8l 2c9m 2c9m 2dqs

67 assemblies; showing the first 12

Homodimer
1iwo 1vfp 2agv 3b9r 3j7t

5 assemblies

Homotetramer
1wpg

1 assemblies

Other homooligomers

None

Heteromeric or nucleic-acid complex
2voy 4y3u

2 assemblies

View Construct and Data Evidence
UniProt name AT2A1_RABIT
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–994； UniProt 1–994

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_id1kju
Deposition date deposition_date2001-12-05
Structure title titleCa2+-ATPase in the E2 State
Keywords keywordsION PUMP, CALCIUM, MEMBRANE PROTEIN, P-TYPE ATPASE, ACTIVE TRANSPORT, E2, CRYO-EM, HYDROLASE; HYDROLASE
Experimental Method methodELECTRON MICROSCOPY
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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.

1kju__assembly_1__model_1

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

Download this curve (.dat)

1kju__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.

1kju__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）36.58 Å
Rg (electron density)37.26 Å
Total Rg37.26 Å
Atom count7671
Residues994
Excluded volume137850 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1kju__assembly_1__model_1 monomeric （1） 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 (1)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd1kjua1
Class classb — All beta proteins
Fold Fold foldb.82 — Double-stranded beta-helix
Superfamily Superfamily superfamilyb.82.7 — Metal cation-transporting ATPase, actuator domain A
Family Family familyb.82.7.1 — Metal cation-transporting ATPase, actuator domain A
Domain ID domain_idd1kjua2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.108 — HAD-like
Superfamily Superfamily superfamilyc.108.1 — HAD-like
Family Family familyc.108.1.7 — Meta-cation ATPase, catalytic domain P
Domain ID domain_idd1kjua3
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.220 — Metal cation-transporting ATPase, ATP-binding domain N
Superfamily Superfamily superfamilyd.220.1 — Metal cation-transporting ATPase, ATP-binding domain N
Family Family familyd.220.1.1 — Metal cation-transporting ATPase, ATP-binding domain N
Domain ID domain_idd1kjua4
Class classf — Membrane and cell surface proteins and peptides
Fold Fold foldf.33 — Metal cation-transporting ATPase, transmembrane domain
Superfamily Superfamily superfamilyf.33.1 — Metal cation-transporting ATPase, transmembrane domain
Family Family familyf.33.1.1 — Metal cation-transporting ATPase, transmembrane domain
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7. Citations (5)