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9st9

CryoEM structure of native quinol dependent Nitric Oxide Reductase at pH 6.5

Method: ELECTRON MICROSCOPY D_max: 112.9 Å Quality: EXCELLENT

SAXS Profile

P(r) Distribution

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1. Structure Basics

entry_id	9st9
deposition_date	2025-09-26
title	CryoEM structure of native quinol dependent Nitric Oxide Reductase at pH 6.5
keywords	quinol-dependent Nitric Oxide Reductase, Membrane Protein; MEMBRANE PROTEIN
method	ELECTRON MICROSCOPY

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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	35.85 Å
rg_electron	35.00 Å
i0	335373000.00
molecular_weight	158980.0 kDa
excluded_volume	202740 Å³
envelope_volume	248590 Å³
shell_volume	57072 Å³
envelope_diameter	116.3 Å
shell_rg	43.27 Å
envelope_rg	34.86 Å
shape_rg	35.00 Å
total_rg	35.60 Å
total_atoms	11263
n_residues	1400
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	112.9 Å
rg_real	35.71 Å
rg_real_error	0.79 Å
i0_real	3.3540e+08
i0_real_error	5.9380e+06
rg_reciprocal	35.80 Å
i0_reciprocal	335400000.0000
total_estimate	0.9038
solution_quality	EXCELLENT a EXCELLENT solution
n_peaks	1
r_peak_primary	41.0 Å
skewness	0.180
kurtosis	-0.599
angular_range	— – 0.2200 Å⁻¹
current_alpha	0.0000
highest_alpha	125200000.0000
n_real_points	45
gnom_version	4.1.3
quality_criteria	AN1: 0.000; Oscil: 0.939; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.999; Smooth: 0.928

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4. Crystallography & Experiment

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5. Entities & Polymer Info (5)

Entity 1 polymer

description	Nitric oxide reductase subunit B
formula_weight	84724.9 kDa
ec_number	1.7.2.5
src_method	man
entity_count	2

Polymer

type	polypeptide(L)
strand_id	A,B
atom_count	11286

MGPYRRLWFTLIAVLAVTFALLGFYGGEVYRQAPPIPEEVASADGTRLFGRDDILDGQTAWQSIGGMQLGSIWGHGAYQAPDWTADWLHRELMAWLDLAARDAHGRDYGQLDAPAQAALREQLKAEYRANRADAAGGKLTLSPRRAQAVAQTEAYYDQLFSDAPALHRSRENYAMKENTLPDANRRRQMTHFFFWTAWAAATEREGTSVTYTNNWPHEPLIGNHPSSENVMWSIISVVVLLAGIGLLIWAWAFLRGKEEDEPPAPARDPLTTFALTPSQRALGKYLFLVVALFGFQVLLGGFTAHYTVEGQKFYGIDLSQWFPYSLVRTWHIQSALFWIATGFLAAGLFLAPLINGGRDPKYQKAGVDILFWALVLVVVGSFAGNYLAIAQIMPPDLNFWLGHQGYEYVDLGRLWQIGKFAGICFWLVLMLRGIVPALRTPGGDKNLLALLTASVGAIGLFYGAGFFYGERTHLTVMEYWRWWIVHLWVEGFFEVFATTALAFIFSTLGLVSRRMATTASLASASLFMLGGIPGTFHHLYFAGTTTPVMAVGASFSALEVVPLIVLGHEAWENWRLKTRAPWMENLKWPLMCFVAVAFWNMLGAGVFGFMINPPVSLYYIQGLNTTPVHAHAALFGVYGFLALGFTLLVLRYIRPQYALSPGLMKLAFWGLNLGLALMIFTSLLPIGLIQFHASVSEGMWYARSEAFMQQDILKTLRWGRTFGDVVFLLGALAMVVQVILGLLSGKPAAAEPVLRAEPARR

Source

organism	Achromobacter xylosoxidans
ncbi_taxonomy_id	85698
host_organism	Escherichia coli BL21(DE3)

Entity 2 non-polymer

description	PROTOPORPHYRIN IX CONTAINING FE
formula_weight	616.5 kDa
src_method	syn
entity_count	4

Entity 3 non-polymer

description	CALCIUM ION
formula_weight	40.1 kDa
src_method	syn
entity_count	2

Entity 4 non-polymer

description	FE (III) ION
formula_weight	55.8 kDa
src_method	syn
entity_count	2

Entity 5 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	1.000 Å
length_b	1.000 Å
length_c	1.000 Å
angle_alpha	90.00 °
angle_beta	90.00 °
angle_gamma	90.00 °
z_pdb	—

space_group	P 1
int_tables_number	1
crystal_system	—

resolution	3.10 Å
resolution_method	—
num_particles	151521

fit	/app/data/saxs_computation/st/9st9/9st9.fit
pddf	/app/data/pr_computation/st/9st9/9st9.pr.out
profile	/app/data/saxs_computation/st/9st9/9st9.dat