SAXSdb — 9lwo

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

EF-hand calcium-binding domain-containing protein 9

Mus musculus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	Armadillo-like helical domain containing 2 × 1 （A0A286YCZ6） Cation channel sperm-associated auxiliary subunit zeta × 1 （Q9CQP8）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	EFCB9_MOUSE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–216； UniProt 1–216

Armadillo-like helical domain containing 2

Mus musculus

UniProt A0A286YCZ6

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	EF-hand calcium-binding domain-containing protein 9 × 1 （Q9DAM2） Cation channel sperm-associated auxiliary subunit zeta × 1 （Q9CQP8）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0A286YCZ6_MOUSE
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–238； UniProt 1–238

Cation channel sperm-associated auxiliary subunit zeta

Mus musculus

UniProt Q9CQP8

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	EF-hand calcium-binding domain-containing protein 9 × 1 （Q9DAM2） Armadillo-like helical domain containing 2 × 1 （A0A286YCZ6）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CTSRZ_MOUSE
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 1–194； UniProt 1–194

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	9lwo
Deposition date deposition_date	2025-02-15
Structure title title	Cryo-EM structure of the cytosolic ARMH2-EFCAB9-CATSPERz subcomplex of the mouse CatSpermasome
Keywords keywords	CatSper, sperm motility, male fertility, channel, ARMH2, CYTOSOLIC PROTEIN; CYTOSOLIC PROTEIN
Experimental Method method	ELECTRON 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.

9lwo__assembly_1__model_1

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

Download this curve (.dat)

9lwo__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9lwo__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	27.94 Å
Rg (electron density)	27.01 Å
Total Rg	27.65 Å
Atom count	3684
Residues	437
Excluded volume	66382 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9lwo__assembly_1__model_1`	trimeric （3）	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)

Entity 1 Entity 1 polymer

Description description	EF-hand calcium-binding domain-containing protein 9
Molecular weight formula_weight	26170.5 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	3684

MKLTPGCFLWYLYMDKIYCLLSLRNVKALMVYFHLLDVHHRNTLNDVLFFHFLQHVTNLNKSQIGMIFDLLDWTAVGEIGFDQFYVLICILLAHQDHLEDHFMYRHSRPVFELLDLDGEMNIGAANFQNYRFLFNIKKQELRDLFHDFDITGDRLLNYKEFKLYTIFCTDKSIDRKKRRKDREAAREREKEKGKDKEKYLHLKKIYSSMLSHRSIL

Source Source

Source organism organism	Mus musculus
Common name common_name	house mouse
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	Mus musculus

Entity 2 Entity 2 polymer

Description description	Armadillo-like helical domain containing 2
Molecular weight formula_weight	27780.2 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

MSYENWGICGRICSICSQTCQLFRTLSESLRSFWDNKVKRRFFASPQKEEVPTSTADYIFHREKILELGSILKNKRLSLDKRAQAAQKIGLLSFTGGMSAAQFASEYMTEVAFLLQKKKAMSFRTKILLLQSVACWCYLNPDSQRKVRQLEIIPTLIDFLEESFQSSNKTEINTHRLCQFWVCYALTVITCNNLAIMRELRSYRSLKFHLQLVATENWSGWPENFAEVLYFLIGFHRN

Source Source

Source organism organism	Mus musculus
Common name common_name	house mouse
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	Mus musculus

Entity 3 Entity 3 polymer

Description description	Cation channel sperm-associated auxiliary subunit zeta
Molecular weight formula_weight	22776.6 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MEESVKPVPKHANHRRSSVRSSLYGDVRDLWSTATMSTANVSVSDVCEDFDEEGKSVRNRIRKYSQTISIRDSLNLEPEEIQQQARRELELCHGRSLEHGEDHEESETSLASSTSESLIFSLWKPHRTYWTEQQNRLPLPLMELMETEVLDILKKALITYRSTIGRNHFMTKELQGYIEGIRKRRNKRLYFLDQ

Source Source

Source organism organism	Mus musculus
Common name common_name	house mouse
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	Mus musculus

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Resolution resolution	4.77 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	83920

Cryo-EM structure of the cytosolic ARMH2-EFCAB9-CATSPERz subcomplex of the mouse CatSpermasome

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

EF-hand calcium-binding domain-containing protein 9

State in the Current Structure

Other States of the Same Protein in the Database

Armadillo-like helical domain containing 2

State in the Current Structure

Other States of the Same Protein in the Database

Cation channel sperm-associated auxiliary subunit zeta

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

9lwo__assembly_1__model_1

9lwo__assembly_1__model_1 | I(q)

9lwo__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

7. Citations (1)

Cryo-EM structure of the cytosolic ARMH2-EFCAB9-CATSPERz subcomplex of the mouse CatSpermasome

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

EF-hand calcium-binding domain-containing protein 9

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Armadillo-like helical domain containing 2

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Cation channel sperm-associated auxiliary subunit zeta

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

9lwo__assembly_1__model_1

9lwo__assembly_1__model_1 | I(q)

9lwo__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

7. Citations (1)