2c4a

Structure of Neuraminidase Subtype N9 Complexed with 30 MM Sialic Acid (NANA, NEU5AC), Crystal Soaked for 3 Hours at 291 K.

Method: X-RAY DIFFRACTION D_max: 78.2 Å Quality: GOOD

SAXS 散射曲线 SAXS Profile

P(r) 距离分布 P(r) Distribution

下载 Download SAXS (.dat) P(r) (.pr.out) CIF

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1. 结构基本信息 1. Structure Basics

条目编号 entry_id	2c4a
沉积日期 deposition_date	2005-10-17
结构标题 title	Structure of Neuraminidase Subtype N9 Complexed with 30 MM Sialic Acid (NANA, NEU5AC), Crystal Soaked for 3 Hours at 291 K.
关键词 keywords	HYDROLASE, INFLUENZA TYPE A, NEURAMINIDASE, SIALIC ACID, SUBTYPE N9, GLYCOPROTEIN, GLYCOSIDASE, TRANSMEMBRANE; HYDROLASE
实验方法 method	X-RAY DIFFRACTION

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2. SAXS 参数 (CRYSOL 理论计算) 2. SAXS Parameters (CRYSOL)

回转半径 Rg (Guinier) rg_guinier	21.49 Å
回转半径 Rg (电子) rg_electron	20.68 Å
零角强度 I(0) i0	39432800.00
分子量 molecular_weight	46496.0 kDa
排除体积 excluded_volume	57166 Å³
包络体积 envelope_volume	66271 Å³
水化壳体积 shell_volume	25703 Å³
包络直径 envelope_diameter	79.5 Å
壳层 Rg shell_rg	28.35 Å
包络 Rg envelope_rg	21.77 Å
形状 Rg shape_rg	20.65 Å
总 Rg total_rg	21.65 Å
总原子数 total_atoms	3257
残基数 n_residues	385
球谐函数阶数 n_harmonics	20
q 范围 q_range	— – 0.5000 Å⁻¹
数据点数 n_points	101
壳层类型 shell_type	directional
溶剂电子密度 solvent_density	0.3340 e/Å³
壳层衬度 contrast_shell	0.0300 e/Å³
CRYSOL 版本 crysol_version	4.1.3

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3. P(r) 距离分布 (GNOM 反演) 3. P(r) Analysis (GNOM)

最大尺寸 Dmax dmax	78.2 Å
Rg (实空间) rg_real	21.42 Å
Rg 误差 (实空间) rg_real_error	0.48 Å
I(0) (实空间) i0_real	3.9430e+07
I(0) 误差 (实空间) i0_real_error	5.1870e+05
Rg (倒空间) rg_reciprocal	21.43 Å
I(0) (倒空间) i0_reciprocal	39430000.0000
解质量估计 total_estimate	0.8251
解质量评级 solution_quality	GOOD a GOOD solution
P(r) 峰数 n_peaks	2
主峰位置 r_peak_primary	27.6 Å
偏度 Skewness skewness	0.359
峰度 Kurtosis kurtosis	0.080
角度范围 angular_range	— – 0.3700 Å⁻¹
当前正则化参数 α current_alpha	0.0000
最高正则化参数 α highest_alpha	15310000.0000
实空间数据点数 n_real_points	69
GNOM 版本 gnom_version	4.1.3
质量判据 quality_criteria	AN1: 0.000; Oscil: 0.590; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.972; Smooth: 0.979

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4. 晶体学与实验 4. Crystallography & Experiment

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5. 实体与聚合体信息 (7)

Entity 1 polymer

描述 description	NEURAMINIDASE SUBTYPE N9
分子量 formula_weight	43723.8 kDa
EC 编号 ec_number	3.2.1.18
来源方法 src_method	man
拷贝数 entity_count	1

聚合体 Polymer

聚合体类型 type	polypeptide(L)
链编号 strand_id	A
原子数 atom_count	3516

RDFNNLTKGLCTINSWHIYGKDNAVRIGEDSDVLVTREPYVSCDPDECRFYALSQGTTIRGKHSNGTIHDRSQYRALISWPLSSPPTVYNSRVECIGWSSTSCHDGKTRMSICISGPNNNASAVIWYNRRPVTEINTWARNILRTQESECVCHNGVCPVVFTDGSATGPAETRIYYFKEGKILKWEPLAGTAKHIEECSCYGERAEITCTCRDNWQGSNRPVIRIDPVAMTHTSQYICSPVLTDNPRPNDPTVGKCNDPYPGNNNNGVKGFSYLDGVNTWLGRTISIASRSGYEMLKVPNALTDDKSKPTQGQTIVLNTDWSGYSGSFMDYWAEGECYRACFYVELIRGRPKEDKVWWTSNSIVSMCSSTEFLGQWDWPDGAKIEYFL

来源 Source

来源生物 organism	INFLUENZA A VIRUS
通用名 common_name	AVIAN INFLUENZA VIRUS A
NCBI 分类编号 ncbi_taxonomy_id	11320
宿主生物 host_organism	GALLUS GALLUS

Entity 2 branched

描述 description	;alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose ;
分子量 formula_weight	1559.4 kDa
来源方法 src_method	man
拷贝数 entity_count	1

Entity 3 branched

描述 description	2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
分子量 formula_weight	424.4 kDa
来源方法 src_method	man
拷贝数 entity_count	1

Entity 4 non-polymer

描述 description	N-acetyl-alpha-neuraminic acid
分子量 formula_weight	309.3 kDa
来源方法 src_method	man
拷贝数 entity_count	2

Entity 5 non-polymer

描述 description	2-acetamido-2-deoxy-beta-D-glucopyranose
分子量 formula_weight	221.2 kDa
来源方法 src_method	man
拷贝数 entity_count	1

Entity 6 non-polymer

描述 description	CALCIUM ION
分子量 formula_weight	40.1 kDa
来源方法 src_method	syn
拷贝数 entity_count	1

Entity 7 water

描述 description	water
分子量 formula_weight	18.0 kDa
来源方法 src_method	nat
拷贝数 entity_count	259

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6. 折叠分类 (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

结构域编号 domain_id	d2c4aa_
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.68 — 6-bladed beta-propeller
超家族 Superfamily superfamily	b.68.1 — Sialidases
家族 Family family	b.68.1.1 — Sialidases (neuraminidases)

CATH v4.4 (1 domains)

结构域编号 domain_id	2c4aA00
类 Class class	2 — Mainly Beta
架构 Architecture architecture	120 — 6 Propeller
拓扑 Topology topology	10 — Neuraminidase
同源超家族 H-superfamily homologous superfamily	10 —

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7. 引用文献 (1)

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晶胞边长 a length_a	181.336 Å
晶胞边长 b length_b	181.336 Å
晶胞边长 c length_c	181.336 Å
晶胞夹角 α angle_alpha	90.00 °
晶胞夹角 β angle_beta	90.00 °
晶胞夹角 γ angle_gamma	90.00 °
晶胞分子数 Z z_pdb	48

空间群 space_group	I 4 3 2
空间群编号 int_tables_number	211
晶系 crystal_system	—

分辨率 resolution	2.150 Å
最低分辨率 resolution_low	30.100 Å
R 因子 r_factor	0.1600
R_work r_work	0.1580
R_free r_free	0.2050

fit	/app/data/saxs_computation/c4/2c4a/2c4a.fit
pddf	/app/data/pr_computation/c4/2c4a/2c4a.pr.out
profile	/app/data/saxs_computation/c4/2c4a/2c4a.dat