SAXSdb — 9szy

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1. Structure Basics

entry_id	9szy
deposition_date	2025-10-16
last_revision	2026-05-27
title	PCSK9 CTD fragment structure
keywords	PCSK9, CTD, fragment, CHAPERONE; CHAPERONE
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	26.03 Å
rg_electron	25.21 Å
i0	128880000.00
molecular_weight	57909.0 kDa
excluded_volume	54910 Å³
envelope_volume	93260 Å³
shell_volume	30536 Å³
envelope_diameter	84.8 Å
shell_rg	32.81 Å
envelope_rg	25.43 Å
shape_rg	25.19 Å
total_rg	25.83 Å
total_atoms	4360
n_residues	579
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	82.3 Å
rg_real	25.97 Å
rg_real_error	0.46 Å
i0_real	1.2890e+08
i0_real_error	1.6240e+06
rg_reciprocal	25.99 Å
i0_reciprocal	128900000.0000
total_estimate	0.9066
solution_quality	EXCELLENT a EXCELLENT solution
n_peaks	2
r_peak_primary	29.7 Å
skewness	0.246
kurtosis	-0.521
angular_range	— – 0.3050 Å⁻¹
current_alpha	0.0000
highest_alpha	19240000.0000
n_real_points	62
gnom_version	4.1.3
quality_criteria	AN1: 0.000; Oscil: 0.934; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.999; Smooth: 0.980

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4. Crystallography & Experiment

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5. Entities & Polymer Info (4)

Entity 1 polymer

description	Proprotein convertase subtilisin/kexin type 9
formula_weight	17035.5 kDa
ec_number	3.4.21.-
src_method	man
entity_count	1

Polymer

type	polypeptide(L)
strand_id	A
atom_count	4692

MGTVSSRRSWWPLPLLLLLLLLLGPAGARAQEDEDGDYEELVLALRSEEDGLAEAPEHGTTATFHRCAKDPWRLPGTYVVVLKEETHLSQSERTARRLQAQAARRGYLTKILHVFHGLLPGFLVKMSGDLLELALKLPHVDYIEEDSSVFAQ

Source

organism	Homo sapiens
common_name	human
ncbi_taxonomy_id	9606
host_organism	Escherichia coli

Entity 2 polymer

description	Proprotein convertase subtilisin/kexin type 9
formula_weight	74389.2 kDa
ec_number	3.4.21.-
src_method	man
entity_count	1

Polymer

type	polypeptide(L)
strand_id	B

MGTVSSRRSWWPLPLLLLLLLLLGPAGARAQEDEDGDYEELVLALRSEEDGLAEAPEHGTTATFHRCAKDPWRLPGTYVVVLKEETHLSQSERTARRLQAQAARRGYLTKILHVFHGLLPGFLVKMSGDLLELALKLPHVDYIEEDSSVFAQSIPWNLERITPPRYRADEYQPPDGGSLVEVYLLDTSIQSDHREIEGRVMVTDFENVPEEDGTRFHRQASKCDSHGTHLAGVVSGRDAGVAKGASMRSLRVLNCQGKGTVSGTLIGLEFIRKSQLVQPVGPLVVLLPLAGGYSRVLNAACQRLARAGVVLVTAAGNFRDDACLYSPASAPEVITVGATNAQDQPVTLGTLGTNFGRCVDLFAPGEDIIGASSDCSTCFVSQSGTSQAAAHVAGIAAMMLSAEPELTLAELRQRLIHFSAKDVINEAWFPEDQRVLTPNLVAALPPSTHGAGWQLFCRTVWSAHSGPTRMATAIARCAPDEELLSCSSFSRSGKRRGERMEAQGGKLVCRAHNAFGGEGVYAIARCCLLPQANCSVHTAPPAEASMGTRVHCHQQGHVLTGCSSHWEVEDLGTHKPPVLRPRGQPNQCVGHREASIHASCCHAPGLECKVKEHGIPAPQEQVTVACEEGWTLTGCSALPGTSHVLGAYAVDNTCVVRSRDVSTTGSTSEGAVTAVAICCRSRHLAQASQELQ

Source

organism	Homo sapiens
common_name	human
ncbi_taxonomy_id	9606
host_organism	Escherichia coli

Entity 3 non-polymer

description	~{N}-(2-methylpropyl)pyrimidin-2-amine
formula_weight	151.2 kDa
src_method	syn
entity_count	1

Entity 4 water

description	water
formula_weight	18.0 kDa
src_method	nat
entity_count	325

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6. Citations (1)

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length_a	62.602 Å
length_b	70.121 Å
length_c	148.039 Å
angle_alpha	90.00 °
angle_beta	90.00 °
angle_gamma	90.00 °
z_pdb	4

space_group	P 21 21 21
int_tables_number	19
crystal_system	—

resolution	1.759 Å
resolution_low	74.020 Å
r_factor	0.2003
r_work	0.1984
r_free	0.2362

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

PCSK9 CTD fragment structure

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 (4)

Entity 1 polymer

Polymer

Source

Entity 2 polymer

Polymer

Source

Entity 3 non-polymer

Entity 4 water

6. Citations (1)

7. Files & Curves (10)

Files (7)

Curves (3)