SAXSdb — 4xpz

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

RNA polymerase II subunit A C-terminal domain phosphatase

Schizosaccharomyces pombe (strain 972 / ATCC 24843)

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	ALUMINUM FLUORIDE × 1 TETRAETHYLENE GLYCOL × 2 MAGNESIUM ION × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	FCP1_SCHPO
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–183； UniProt 149–329 Author chain A； PDBConstruct 186–372； UniProt 394–580

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	4xpz
Deposition date deposition_date	2015-01-18
Structure title title	Structure of fission yeast RNA polymerase II CTD phosphatase Fcp1-R271A bound to aluminum fluoride
Keywords keywords	Phosphatase, PolII-CTD, Transition state, AlF3, HYDROLASE; 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.

4xpz__assembly_1__model_1

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

Download this curve (.dat)

4xpz__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4xpz__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	23.76 Å
Rg (electron density)	22.48 Å
Total Rg	23.45 Å
Atom count	2926
Residues	363
Excluded volume	52411 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4xpz__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 (5)

Entity 1 Entity 1 polymer

Description description	RNA polymerase II subunit A C-terminal domain phosphatase
Molecular weight formula_weight	42297.3 kDa
EC 编号 ec_number	3.1.3.16
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	3448

SLSRLESENVKRLRQEKRLSLIVDLDQTIIHATVDPTVGEWMSDPGNVNYDVLRDVRSFNLQEGPSGYTSCYYIKFRPGLAQFLQKISELYELHIYTMGTKAYAKEVAKIIDPTGKLFQDRVLSADDSGSLAQKSLRRLFPCDTSMVVVIDDRGDVWDWNPNLIKVVPYEFFVGIGDINSNFLGSNREALEEQNKERVTALELQKSERPLAKQQNALLEDEGKPTPSHTLLHNRDHELERLEKVLKDIHAVYYEEENDISSRSGNHKHANVGLIIPKMKQKVLKGCRLLFSGVIPLGVDVLSSDIAKWAMSFGAEVVLDFSVPPTHLIAAKIRTEKVKKAVSMGNIKVVKLNWLTESLSQWKRLPESDYLLY

Source Source

Source organism organism	Schizosaccharomyces pombe (strain 972 / ATCC 24843)
Common name common_name	Fission yeast
NCBI taxonomy ID ncbi_taxonomy_id	284812
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	ALUMINUM FLUORIDE
Molecular weight formula_weight	84.0 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 non-polymer

Description description	TETRAETHYLENE GLYCOL
Molecular weight formula_weight	194.2 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	398

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6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

Domain ID domain_id	4xpzA01
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	4xpzA02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	10 — S15/NS1, RNA-binding

Domain ID domain_id	4xpzA03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	10190 — BRCT domain

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Unit-cell length a length_a	55.692 Å
Unit-cell length b length_b	79.989 Å
Unit-cell length c length_c	89.132 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.450 Å
Low-resolution limit resolution_low	19.512 Å
R factor r_factor	0.1551
R_work r_work	0.1537
R_free r_free	0.1820

Structure of fission yeast RNA polymerase II CTD phosphatase Fcp1-R271A bound to aluminum fluoride

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

RNA polymerase II subunit A C-terminal domain phosphatase

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

4xpz__assembly_1__model_1

4xpz__assembly_1__model_1 | I(q)

4xpz__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

7. Citations (1)

Structure of fission yeast RNA polymerase II CTD phosphatase Fcp1-R271A bound to aluminum fluoride

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

RNA polymerase II subunit A C-terminal domain phosphatase

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

4xpz__assembly_1__model_1

4xpz__assembly_1__model_1 | I(q)

4xpz__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

7. Citations (1)