1ltt

LACTOSE BINDING TO HEAT-LABILE ENTEROTOXIN REVEALED BY X-RAY CRYSTALLOGRAPHY

Method: X-RAY DIFFRACTION D_max: 85.7 Å Quality: REASONABLE

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	1ltt
沉积日期 deposition_date	1992-07-15
结构标题 title	LACTOSE BINDING TO HEAT-LABILE ENTEROTOXIN REVEALED BY X-RAY CRYSTALLOGRAPHY
关键词 keywords	TOXIN; TOXIN
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	28.33 Å
回转半径 Rg (电子) rg_electron	27.03 Å
零角强度 I(0) i0	125195000.00
分子量 molecular_weight	86929.0 kDa
排除体积 excluded_volume	108310 Å³
包络体积 envelope_volume	127650 Å³
水化壳体积 shell_volume	38393 Å³
包络直径 envelope_diameter	90.2 Å
壳层 Rg shell_rg	35.22 Å
包络 Rg envelope_rg	27.01 Å
形状 Rg shape_rg	27.06 Å
总 Rg total_rg	27.72 Å
总原子数 total_atoms	6093
残基数 n_residues	741
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	85.7 Å
Rg (实空间) rg_real	28.14 Å
Rg 误差 (实空间) rg_real_error	0.40 Å
I(0) (实空间) i0_real	1.2520e+08
I(0) 误差 (实空间) i0_real_error	1.6710e+06
Rg (倒空间) rg_reciprocal	28.20 Å
I(0) (倒空间) i0_reciprocal	125200000.0000
解质量估计 total_estimate	0.7334
解质量评级 solution_quality	REASONABLE a REASONABLE solution
P(r) 峰数 n_peaks	2
主峰位置 r_peak_primary	36.7 Å
偏度 Skewness skewness	0.125
峰度 Kurtosis kurtosis	-0.545
角度范围 angular_range	— – 0.2800 Å⁻¹
当前正则化参数 α current_alpha	0.0000
最高正则化参数 α highest_alpha	45900000.0000
实空间数据点数 n_real_points	57
GNOM 版本 gnom_version	4.1.3
质量判据 quality_criteria	AN1: 0.000; Oscil: 0.956; Stabil: 1.000; Sysdev: 0.242; Positv: 1.000; Valcen: 0.991; Smooth: 0.944

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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 (5)

Entity 1 polymer

描述 description	HEAT-LABILE ENTEROTOXIN, SUBUNIT B
分子量 formula_weight	11807.5 kDa
来源方法 src_method	man
拷贝数 entity_count	5

聚合体 Polymer

聚合体类型 type	polypeptide(L)
链编号 strand_id	D,E,F,G,H
原子数 atom_count	6427

APQTITELCSEYRNTQIYTINDKILSYTESMAGKREMVIITFKSGETFQVEVPGSQHIDSQKKAIERMKDTLRITYLTETKIDKLCVWNNKTPNSIAAISMKN

来源 Source

来源生物 organism	Escherichia coli
NCBI 分类编号 ncbi_taxonomy_id	562
宿主生物 host_organism	Escherichia coli

Entity 2 polymer

描述 description	HEAT-LABILE ENTEROTOXIN, SUBUNIT A
分子量 formula_weight	21354.6 kDa
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

RLYRADSRPPDEIKRSGGLMPRGHNEYFDRGTQMNINLYDHARGTQTGFVRYDDGYVSTSLSLRSAHLAGQSILSGYSTYYIYVIATAPNMFNVNDVLGVYSPHPYEQEVSALGGIPYSQIYGWYRVNFGVIDERLHRNREYRDRYYRNLNIAPAEDGYRLAGFPPDHQAWREEPWIHHAPQGCG

来源 Source

来源生物 organism	Escherichia coli
NCBI 分类编号 ncbi_taxonomy_id	562
宿主生物 host_organism	Escherichia coli

Entity 3 polymer

描述 description	HEAT-LABILE ENTEROTOXIN, SUBUNIT A
分子量 formula_weight	4953.4 kDa
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	C

GDTCNEETQNLSTIYLREYQSKVKRQIFSDYQSEVDIYNRI

来源 Source

来源生物 organism	Escherichia coli
NCBI 分类编号 ncbi_taxonomy_id	562
宿主生物 host_organism	Escherichia coli

Entity 4 branched

描述 description	beta-D-galactopyranose-(1-4)-beta-D-glucopyranose
分子量 formula_weight	342.3 kDa
来源方法 src_method	man
拷贝数 entity_count	5

Entity 5 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	334

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6. 折叠分类 (SCOP + CATH) 13 domains

SCOP 2.08 (6 domains)

结构域编号 domain_id	d1ltt.1
类 Class class	d — Alpha and beta proteins (a+b)
折叠类型 Fold fold	d.166 — ADP-ribosylation
超家族 Superfamily superfamily	d.166.1 — ADP-ribosylation
家族 Family family	d.166.1.1 — ADP-ribosylating toxins

结构域编号 domain_id	d1lttd_
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.40 — OB-fold
超家族 Superfamily superfamily	b.40.2 — Bacterial enterotoxins
家族 Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

结构域编号 domain_id	d1ltte_
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.40 — OB-fold
超家族 Superfamily superfamily	b.40.2 — Bacterial enterotoxins
家族 Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

结构域编号 domain_id	d1lttf_
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.40 — OB-fold
超家族 Superfamily superfamily	b.40.2 — Bacterial enterotoxins
家族 Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

结构域编号 domain_id	d1lttg_
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.40 — OB-fold
超家族 Superfamily superfamily	b.40.2 — Bacterial enterotoxins
家族 Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

结构域编号 domain_id	d1ltth_
类 Class class	b — All beta proteins
折叠类型 Fold fold	b.40 — OB-fold
超家族 Superfamily superfamily	b.40.2 — Bacterial enterotoxins
家族 Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

CATH v4.4 (7 domains)

结构域编号 domain_id	1lttA00
类 Class class	3 — Alpha Beta
架构 Architecture architecture	90 — Alpha-Beta Complex
拓扑 Topology topology	210 — Heat-Labile Enterotoxin; Chain A
同源超家族 H-superfamily homologous superfamily	10 — Heat-Labile Enterotoxin, subunit A

结构域编号 domain_id	1lttC00
类 Class class	1 — Mainly Alpha
架构 Architecture architecture	20 — Up-down Bundle
拓扑 Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
同源超家族 H-superfamily homologous superfamily	240 —

结构域编号 domain_id	1lttD00
类 Class class	2 — Mainly Beta
架构 Architecture architecture	40 — Beta Barrel
拓扑 Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
同源超家族 H-superfamily homologous superfamily	110 —

结构域编号 domain_id	1lttE00
类 Class class	2 — Mainly Beta
架构 Architecture architecture	40 — Beta Barrel
拓扑 Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
同源超家族 H-superfamily homologous superfamily	110 —

结构域编号 domain_id	1lttF00
类 Class class	2 — Mainly Beta
架构 Architecture architecture	40 — Beta Barrel
拓扑 Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
同源超家族 H-superfamily homologous superfamily	110 —

结构域编号 domain_id	1lttG00
类 Class class	2 — Mainly Beta
架构 Architecture architecture	40 — Beta Barrel
拓扑 Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
同源超家族 H-superfamily homologous superfamily	110 —

结构域编号 domain_id	1lttH00
类 Class class	2 — Mainly Beta
架构 Architecture architecture	40 — Beta Barrel
拓扑 Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
同源超家族 H-superfamily homologous superfamily	110 —

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7. 引用文献 (3)

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晶胞边长 a length_a	119.800 Å
晶胞边长 b length_b	101.200 Å
晶胞边长 c length_c	64.200 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	20

空间群 space_group	P 21 21 21
空间群编号 int_tables_number	19
晶系 crystal_system	—

分辨率 resolution	2.300 Å
最低分辨率 resolution_low	8.000 Å
R 因子 r_factor	0.1820
R_work r_work	0.1820
R_free r_free	—

fit	/app/data/saxs_computation/lt/1ltt/1ltt.fit
pddf	/app/data/pr_computation/lt/1ltt/1ltt.pr.out
profile	/app/data/saxs_computation/lt/1ltt/1ltt.dat

LACTOSE BINDING TO HEAT-LABILE ENTEROTOXIN REVEALED BY X-RAY CRYSTALLOGRAPHY

SAXS 散射曲线 SAXS Profile

P(r) 距离分布 P(r) Distribution

1. 结构基本信息 1. Structure Basics

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

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

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

晶胞参数 Unit Cell

对称性 Symmetry

精修参数 Refinement

5. 实体与聚合体信息 (5)

Entity 1 polymer

聚合体 Polymer

来源 Source

Entity 2 polymer

聚合体 Polymer

来源 Source

Entity 3 polymer

聚合体 Polymer

来源 Source

Entity 4 branched

Entity 5 water

6. 折叠分类 (SCOP + CATH) 13 domains

SCOP 2.08 (6 domains)

CATH v4.4 (7 domains)

7. 引用文献 (3)

8. 文件与曲线 (10)

Files (7)

Curves (3)