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9pr8

Crystal Structure of the Clostridiodes difficile CspC-CspA heterodimer.

Method: X-RAY DIFFRACTION D_max: 132.7 Å Quality: REASONABLE

SAXS Profile

P(r) Distribution

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1. Structure Basics

entry_id	9pr8
deposition_date	2025-07-23
title	Crystal Structure of the Clostridiodes difficile CspC-CspA heterodimer.
keywords	Pseudoproteases, heterodimer, signaling proteins, SIGNALING PROTEIN; SIGNALING 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	41.76 Å
rg_electron	41.13 Å
i0	737551000.00
molecular_weight	226470.0 kDa
excluded_volume	284020 Å³
envelope_volume	358080 Å³
shell_volume	70385 Å³
envelope_diameter	136.4 Å
shell_rg	48.48 Å
envelope_rg	40.66 Å
shape_rg	41.14 Å
total_rg	41.40 Å
total_atoms	15997
n_residues	2165
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	132.7 Å
rg_real	41.66 Å
rg_real_error	0.79 Å
i0_real	7.3760e+08
i0_real_error	1.1530e+07
rg_reciprocal	41.76 Å
i0_reciprocal	737600000.0000
total_estimate	0.6767
solution_quality	REASONABLE a REASONABLE solution
n_peaks	2
r_peak_primary	48.9 Å
skewness	0.216
kurtosis	-0.571
angular_range	— – 0.1900 Å⁻¹
current_alpha	0.0002
highest_alpha	131700000.0000
n_real_points	39
gnom_version	4.1.3
quality_criteria	AN1: 0.000; Oscil: 0.940; Stabil: 1.000; Sysdev: 0.046; Positv: 1.000; Valcen: 0.995; Smooth: 0.839

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4. Crystallography & Experiment

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5. Entities & Polymer Info (3)

Entity 1 polymer

description	Germination-specific protease
formula_weight	60206.2 kDa
src_method	man
entity_count	2

Polymer

type	polypeptide(L)
strand_id	A,B
atom_count	15999

MQSGILSGIDVVHTPEFEEELAGLGMSQNFFKISDSLGVLSINNTDYSSIQRVLQLPSIIRTVSTTKMTLLGEINRGTFGGVVATEEMGVNFFKNNPNINITGRGTLISIADTGIDYLHPDFIYPDGTSKIVYLWDQTKEGTPPDGFYIGTEYTREDINRAIAENDPSLSQDEVGQGTMLSGICSGLGNVNSEYAGIAEDSELIIIKLGKIDGFYNSAMLFAASQYAYKKAFELRRPLVINMSLGTSSLAGLTNRSNSEKAFFTRGLCITAGAGNEGNTQTHTSGIIPHVGGSVEVELELNEDEEELSLELWLNRPDKADVIIVSPTGEESKSVGISNYNKVTGLFDLEGTEYSITYIYPTTESGQQFTNVTLKNAKRGVWKIRLVGVYIITGRYNLYLPNRELLKSGTRFREVDPFYTINYPAIQDDLITVGAYNTINGSLWQSSSRGPTIEDRLKPDIVAPGVNIIAAYPGNTYATITGTAAASAHAAGAAAMYFQYTFVDGRYPNQAEVQKIKTFMQAGARKDSNTVYPNTNSGYGLLDVRGMFDVLR

Source

organism	Clostridia
ncbi_taxonomy_id	186801
host_organism	Escherichia

Entity 2 polymer

description	Germination-specific protease
formula_weight	62360.4 kDa
src_method	man
entity_count	2

Polymer

type	polypeptide(L)
strand_id	C,D

MEKSYCIIYQGDIESALQENGINRYMVLNSQLAVIYVPVDFDETILNNIIQVAWWEESEPMSSLIEITNNVNNGETITTAAETDYIYENPYNDITGRGILLAVIDSGIDYLHPDFINDDGTSKVLYLWDQEANTNPPPEGFIFGSEFTRSQLNIAINRNDGSLSQDNIGTGTLVSGILAGNGRINSQYRGITTESDLIVVKLKSYTDTYYAGRINYSVSDFLAAITYVTNIARTENKPLIINLTIGVKSSAVATTSILDTFNILSSAGVVVVSGAGNQGNTDIHYSGRFSSVGEVQDVIIQDGDDYALDITLNTNGPDKVGAQIISPSGEVSHDIRYSPDFYIYRGKFNLENTTYAMRFIYPYITSGKENLEIRLRDIKPGVWILRLTSELIISGEYDIYLPNKNLIAPDTRFLDPDSVATITMYAASDDVITVGTFNNKTDSMWIGSSKGPIRGRGIKPDIVASGVDIISTYKNGTYNTGTGTGVSSSIVTGVLALLMEYLEKQDNVPRLSLFTQVLKTYLILGATKLEIYTYPNVSQGYGILNLKNTIQQIANTLLEHHHHHH

Source

organism	Clostridia
ncbi_taxonomy_id	186801
host_organism	Escherichia

Entity 3 water

description	water
formula_weight	18.0 kDa
src_method	nat
entity_count	2

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6. Citations (1)

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length_a	71.143 Å
length_b	105.505 Å
length_c	311.325 Å
angle_alpha	90.00 °
angle_beta	90.00 °
angle_gamma	90.00 °
z_pdb	8

space_group	P 21 21 21
int_tables_number	19
crystal_system	—

resolution	3.350 Å
resolution_low	99.920 Å
r_factor	0.2478
r_work	0.2462
r_free	0.2782

fit	/app/data/saxs_computation/pr/9pr8/9pr8.fit
pddf	/app/data/pr_computation/pr/9pr8/9pr8.pr.out
profile	/app/data/saxs_computation/pr/9pr8/9pr8.dat

Crystal Structure of the Clostridiodes difficile CspC-CspA heterodimer.

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 (3)

Entity 1 polymer

Polymer

Source

Entity 2 polymer

Polymer

Source

Entity 3 water

6. Citations (1)

7. Files & Curves (10)

Files (7)

Curves (3)