Crystal structure of C terminal regulatory domain of cyanobacterial bicarbonate transporter CmpABCD

Method: X-RAY DIFFRACTION D_max: 74.3 Å Quality: GOOD

SAXS Profile

P(r) Distribution

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1. Structure Basics

entry_id	9uak
deposition_date	2025-04-01
last_revision	2026-04-08
title	Crystal structure of C terminal regulatory domain of cyanobacterial bicarbonate transporter CmpABCD
keywords	ABC transporter, bicarbonate importer, membrane transporter, nitrate binding, TRANSPORT PROTEIN; TRANSPORT PROTEIN
method	X-RAY DIFFRACTION

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Download Data

SAXS curve (.dat) P(r) distribution (.pr.out) Structure (CIF)

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2. SAXS Parameters (CRYSOL)

rg_guinier	21.02 Å
rg_electron	19.85 Å
i0	27735900.00
molecular_weight	40578.0 kDa
excluded_volume	50796 Å³
envelope_volume	57682 Å³
shell_volume	23556 Å³
envelope_diameter	75.2 Å
shell_rg	27.11 Å
envelope_rg	20.25 Å
shape_rg	19.86 Å
total_rg	20.74 Å
total_atoms	2857
n_residues	366
n_harmonics	20
q_range	— – 0.5000 Å⁻¹
n_points	101
shell_type	directional
solvent_density	0.3340 e/Å³
contrast_shell	0.0300 e/Å³
crysol_version	4.1.3

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3. P(r) Analysis (GNOM)

dmax	74.3 Å
rg_real	20.91 Å
rg_real_error	0.47 Å
i0_real	2.7740e+07
i0_real_error	3.5660e+05
rg_reciprocal	20.93 Å
i0_reciprocal	27740000.0000
total_estimate	0.8507
solution_quality	GOOD a GOOD solution
n_peaks	2
r_peak_primary	25.9 Å
skewness	0.216
kurtosis	-0.333
angular_range	— – 0.3800 Å⁻¹
current_alpha	0.0000
highest_alpha	11670000.0000
n_real_points	70
gnom_version	4.1.3
quality_criteria	AN1: 0.000; Oscil: 0.688; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.995; Smooth: 0.996

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4. Crystallography & Experiment

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5. Entities & Polymer Info (2)

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6. Citations (1)

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length_a	91.548 Å
length_b	48.935 Å
length_c	96.287 Å
angle_alpha	90.00 °
angle_beta	116.96 °
angle_gamma	90.00 °
z_pdb	4

space_group	C 1 2 1
int_tables_number	5
crystal_system	—

resolution	1.600 Å
resolution_low	27.020 Å
r_factor	0.2035
r_work	0.2020
r_free	0.2332

description	C terminal regulatory domain
formula_weight	45117.4 kDa
src_method	man
entity_count	1

type	polypeptide(L)
strand_id	A
atom_count	3168

Crystal structure of C terminal regulatory domain of cyanobacterial bicarbonate transporter CmpABCD

SAXS Profile

P(r) Distribution

1. Structure Basics

Download Data

2. SAXS Parameters (CRYSOL)

3. P(r) Analysis (GNOM)

4. Crystallography & Experiment

Unit Cell

Symmetry

Refinement

Diffraction

5. Entities & Polymer Info (2)

Entity 1 polymer

Polymer

Source

Entity 2 water

6. Citations (1)

7. Files & Curves (10)

Files (7)

Curves (3)

organism	Pseudanabaena sp. Chao 1811
ncbi_taxonomy_id	2963092
host_organism	Escherichia coli BL21(DE3)

description	water
formula_weight	18.0 kDa
src_method	nat
entity_count	311

fit	/app/data/saxs_computation/ua/9uak/9uak.fit
pddf	/app/data/pr_computation/ua/9uak/9uak.pr.out
profile	/app/data/saxs_computation/ua/9uak/9uak.dat