SAXSdb — 2c9m

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1. Protein Identity and Related Structures Protein Identity & Related Structures

SARCOPLASMIC/ENDOPLASMIC RETICULUM CALCIUM ATPASE 1

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	CALCIUM ION × 4 POTASSIUM ION × 1 CHLORIDE ION × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	CALCIUM ION × 3 POTASSIUM ION × 1 CHLORIDE ION × 1	Consistent with protein count

Other States of the Same Protein in the Database

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 Author chain B； 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_id	2c9m
Deposition date deposition_date	2005-12-13
Structure title title	Structure of (SR) Calcium-ATPase in the Ca2E1 state solved in a P1 crystal form.
Keywords keywords	;CA2+-ATPASE, P-TYPE ATPASE, CATION PUMP, MEMBRANE PROTEIN, MODULATORY ATP, HYDROLASE, ATP-BINDING, CALCIUM TRANSPORT, ION TRANSPORT, METAL-BINDING, NUCLEOTIDE-BINDING, PHOSPHORYLATION ;; HYDROLASE
Experimental Method method	X-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.

2c9m__assembly_1__model_1

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

Download this curve (.dat)

2c9m__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2c9m__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	38.68 Å
Rg (electron density)	38.87 Å
Total Rg	38.87 Å
Atom count	7676
Residues	994
Excluded volume	138160 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2c9m__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2c9m__assembly_2__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 (4)

Entity 1 Entity 1 polymer

Description description	SARCOPLASMIC/ENDOPLASMIC RETICULUM CALCIUM ATPASE 1
Molecular weight formula_weight	109602.6 kDa
EC 编号 ec_number	3.6.3.8
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	15351

MEAAHSKSTEECLAYFGVSETTGLTPDQVKRHLEKYGHNELPAEEGKSLWELVIEQFEDLLVRILLLAACISFVLAWFEEGEETITAFVEPFVILLILIANAIVGVWQERNAENAIEALKEYEPEMGKVYRADRKSVQRIKARDIVPGDIVEVAVGDKVPADIRILSIKSTTLRVDQSILTGESVSVIKHTEPVPDPRAVNQDKKNMLFSGTNIAAGKALGIVATTGVSTEIGKIRDQMAATEQDKTPLQQKLDEFGEQLSKVISLICVAVWLINIGHFNDPVHGGSWIRGAIYYFKIAVALAVAAIPEGLPAVITTCLALGTRRMAKKNAIVRSLPSVETLGCTSVICSDKTGTLTTNQMSVCKMFIIDKVDGDFCSLNEFSITGSTYAPEGEVLKNDKPIRSGQFDGLVELATICALCNDSSLDFNETKGVYEKVGEATETALTTLVEKMNVFNTEVRNLSKVERANACNSVIRQLMKKEFTLEFSRDRKSMSVYCSPAKSSRAAVGNKMFVKGAPEGVIDRCNYVRVGTTRVPMTGPVKEKILSVIKEWGTGRDTLRCLALATRDTPPKREEMVLDDSSRFMEYETDLTFVGVVGMLDPPRKEVMGSIQLCRDAGIRVIMITGDNKGTAIAICRRIGIFGENEEVADRAYTGREFDDLPLAEQREACRRACCFARVEPSHKSKIVEYLQSYDEITAMTGDGVNDAPALKKAEIGIAMGSGTAVAKTASEMVLADDNFSTIVAAVEEGRAIYNNMKQFIRYLISSNVGEVVCIFLTAALGLPEALIPVQLLWVNLVTDGLPATALGFNPPDLDIMDRPPRSPKEPLISGWLFFRYMAIGGYVGAATVGAAAWWFMYAEDGPGVTYHQLTHFMQCTEDHPHFEGLDCEIFEAPEPMTMALSVLVTIEMCNALNSLSENQSLMRMPPWVNIWLLGSICLSMSLHFLILYVDPLPMIFKLKALDLTQWLMVLKISLPVIGLDEILKFIARNYLEG

Entity 2 Entity 2 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	7

Entity 3 Entity 3 non-polymer

Description description	POTASSIUM ION
Molecular weight formula_weight	39.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	2

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6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

Domain ID domain_id	2c9mA01
Class class	2 — Mainly Beta
Architecture architecture	70 — Distorted Sandwich
Topology topology	150 — Calcium-transporting ATPase, cytoplasmic transduction domain A
Homologous superfamily homologous superfamily	10 — Calcium-transporting ATPase, cytoplasmic transduction domain A

Domain ID domain_id	2c9mA02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	1110 — Calcium-transporting ATPase, transmembrane domain
Homologous superfamily homologous superfamily	10 — Calcium-transporting ATPase, transmembrane domain

Domain ID domain_id	2c9mA03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1000 — HAD superfamily/HAD-like

Domain ID domain_id	2c9mA04
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	1110 — Calcium-transporting ATPase, cytoplasmic domain N
Homologous superfamily homologous superfamily	10 — Calcium-transporting ATPase, cytoplasmic domain N

Domain ID domain_id	2c9mB01
Class class	2 — Mainly Beta
Architecture architecture	70 — Distorted Sandwich
Topology topology	150 — Calcium-transporting ATPase, cytoplasmic transduction domain A
Homologous superfamily homologous superfamily	10 — Calcium-transporting ATPase, cytoplasmic transduction domain A

Domain ID domain_id	2c9mB02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	1110 — Calcium-transporting ATPase, transmembrane domain
Homologous superfamily homologous superfamily	10 — Calcium-transporting ATPase, transmembrane domain

Domain ID domain_id	2c9mB03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1000 — HAD superfamily/HAD-like

Domain ID domain_id	2c9mB04
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	1110 — Calcium-transporting ATPase, cytoplasmic domain N
Homologous superfamily homologous superfamily	10 — Calcium-transporting ATPase, cytoplasmic domain N

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Unit-cell length a length_a	64.948 Å
Unit-cell length b length_b	81.276 Å
Unit-cell length c length_c	131.006 Å
Unit-cell angle α angle_alpha	97.64 °
Unit-cell angle β angle_beta	99.94 °
Unit-cell angle γ angle_gamma	95.22 °
Molecules per unit cell Z z_pdb	2

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	3.000 Å
Low-resolution limit resolution_low	15.000 Å
R factor r_factor	0.2660
R_work r_work	0.2660
R_free r_free	0.3170

Structure of (SR) Calcium-ATPase in the Ca2E1 state solved in a P1 crystal form.

1. Protein Identity and Related Structures Protein Identity & Related Structures

SARCOPLASMIC/ENDOPLASMIC RETICULUM CALCIUM ATPASE 1

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2c9m__assembly_1__model_1

2c9m__assembly_1__model_1 | I(q)

2c9m__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)

Structure of (SR) Calcium-ATPase in the Ca2E1 state solved in a P1 crystal form.

1. Protein Identity and Related Structures Protein Identity & Related Structures

SARCOPLASMIC/ENDOPLASMIC RETICULUM CALCIUM ATPASE 1

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2c9m__assembly_1__model_1

2c9m__assembly_1__model_1 | I(q)

2c9m__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)