SAXSdb — 22bd

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1. 结构基本信息 1. Structure Basics

条目编号 entry_id	22bd
沉积日期 deposition_date	2026-01-05
结构标题 title	ICA-1103811 bound KCNQ2/3 heteromer with 2:2 stoichiometry
关键词 keywords	M-channel, KCNQ2/3, heteromeric channel, cryoEM, ICA-110381, MEMBRANE PROTEIN; MEMBRANE PROTEIN
实验方法 method	ELECTRON MICROSCOPY

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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	34.40 Å
回转半径 Rg (电子) rg_electron	33.64 Å
零角强度 I(0) i0	357042000.00
分子量 molecular_weight	106540.0 kDa
排除体积 excluded_volume	105830 Å³
包络体积 envelope_volume	197980 Å³
水化壳体积 shell_volume	48810 Å³
包络直径 envelope_diameter	120.2 Å
壳层 Rg shell_rg	40.42 Å
包络 Rg envelope_rg	33.78 Å
形状 Rg shape_rg	33.63 Å
总 Rg total_rg	34.06 Å
总原子数 total_atoms	8123
残基数 n_residues	999
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	111.5 Å
Rg (实空间) rg_real	34.28 Å
Rg 误差 (实空间) rg_real_error	0.58 Å
I(0) (实空间) i0_real	3.5700e+08
I(0) 误差 (实空间) i0_real_error	4.9330e+06
Rg (倒空间) rg_reciprocal	34.36 Å
I(0) (倒空间) i0_reciprocal	357100000.0000
解质量估计 total_estimate	0.8798
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	46.0 Å
偏度 Skewness skewness	0.230
峰度 Kurtosis kurtosis	-0.283
角度范围 angular_range	— – 0.2300 Å⁻¹
当前正则化参数 α current_alpha	0.0000
最高正则化参数 α highest_alpha	27490000.0000
实空间数据点数 n_real_points	47
GNOM 版本 gnom_version	4.1.3
质量判据 quality_criteria	AN1: 0.000; Oscil: 0.840; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.991; Smooth: 0.922

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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 (4)

Entity 1 polymer

描述 description	Potassium voltage-gated channel subfamily KQT member 2
分子量 formula_weight	95976.7 kDa
来源方法 src_method	man
拷贝数 entity_count	2

聚合体 Polymer

聚合体类型 type	polypeptide(L)
链编号 strand_id	A,C
原子数 atom_count	8123

MVQKSRNGGVYPGPSGEKKLKVGFVGLDPGAPDSTRDGALLIAGSEAPKRGSILSKPRAGGAGAGKPPKRNAFYRKLQNFLYNVLERPRGWAFIYHAYVFLLVFSCLVLSVFSTIKEYEKSSEGALYILEIVTIVVFGVEYFVRIWAAGCCCRYRGWRGRLKFARKPFCVIDIMVLIASIAVLAAGSQGNVFATSALRSLRFLQILRMIRMDRRGGTWKLLGSVVYAHSKELVTAWYIGFLCLILASFLVYLAEKGENDHFDTYADALWWGLITLTTIGYGDKYPQTWNGRLLAATFTLIGVSFFALPAGILGSGFALKVQEQHRQKHFEKRRNPAAGLIQSAWRFYATNLSRTDLHSTWQYYERTVTVPMYSSQTQTYGASRLIPPLNQLELLRNLKSKSGLAFRKDPPPEPSPSKGSPCRGPLCGCCPGRSSQKVSLKDRVFSSPRGVAAKGKGSPQAQTVRRSPSADQSLEDSPSKVPKSWSFGDRSRARQAFRIKGAASRQNSEEASLPGEDIVDDKSCPCEFVTEDLTPGLKVSIRAVCVMRFLVSKRKFKESLRPYDVMDVIEQYSAGHLDMLSRIKSLQSRVDQIVGRGPAITDKDRTKGPAEAELPEDPSMMGRLGKVEKQVLSMEKKLDFLVNIYMQRMGIPPTETEAYFGAKEPEPAPPYHSPEDSREHVDRHGCIVKIVRSSSSTGQKNFSAPPAAPPVQCPPSTSWQPQSHPRQGHGTSPVGDHGSLVRIPPPPAHERSLSAYGGGNRASMEFLRQEDTPGCRPPEGNLRDSDTSISIPSVDHEELERSFSGFSISQSKENLDALNSCYAAVAPCAKVRPYIAEGESDTDSDLCTPCGPPPRSATGEGPFGDVGWAGPRK

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI 分类编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Homo sapiens

Entity 2 polymer

描述 description	Potassium voltage-gated channel subfamily KQT member 3
分子量 formula_weight	96866.4 kDa
来源方法 src_method	man
拷贝数 entity_count	2

聚合体 Polymer

聚合体类型 type	polypeptide(L)
链编号 strand_id	D,B

MGLKARRAAGAAGGGGDGGGGGGGAANPAGGDAAAAGDEERKVGLAPGDVEQVTLALGAGADKDGTLLLEGGGRDEGQRRTPQGIGLLAKTPLSRPVKRNNAKYRRIQTLIYDALERPRGWALLYHALVFLIVLGCLILAVLTTFKEYETVSGDWLLLLETFAIFIFGAEFALRIWAAGCCCRYKGWRGRLKFARKPLCMLDIFVLIASVPVVAVGNQGNVLATSLRSLRFLQILRMLRMDRRGGTWKLLGSAICAHSKELITAWYIGFLTLILSSFLVYLVEKDVPEVDAQGEEMKEEFETYADALWWGLITLATIGYGDKTPKTWEGRLIAATFSLIGVSFFALPAGILGSGLALKVQEQHRQKHFEKRRKPAAELIQAAWRYYATNPNRIDLVATWRFYESVVSFPFFRKEQLEAASSQKLGLLDRVRLSNPRGSNTKGKLFTPLNVDAIEESPSKEPKPVGLNNKERFRTAFRMKAYAFWQSSEDAGTGDPMAEDRGYGNDFPIEDMIPTLKAAIRAVRILQFRLYKKKFKETLRPYDVKDVIEQYSAGHLDMLSRIKYLQTRIDMIFTPGPPSTPKHKKSQKGSAFTFPSQQSPRNEPYVARPSTSEIEDQSMMGKFVKVERQVQDMGKKLDFLVDMHMQHMERLQVQVTEYYPTKGTSSPAEAEKKEDNRYSDLKTIICNYSETGPPEPPYSFHQVTIDKVSPYGFFAHDPVNLPRGGPSSGKVQATPPSSATTYVERPTVLPILTLLDSRVSCHSQADLQGPYSDRISPRQRRSITRDSDTPLSLMSVNHEELERSPSGFSISQDRDDYVFGPNGGSSWMREKRYLAEGETDTDTDPFTPSGSMPLSSTGDGISDSVWTPSNKPI

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI 分类编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Homo sapiens

Entity 3 non-polymer

描述 description	POTASSIUM ION
分子量 formula_weight	39.1 kDa
来源方法 src_method	syn
拷贝数 entity_count	4

Entity 4 non-polymer

描述 description	4-chloranyl-~{N}-(6-chloranylpyridin-3-yl)benzamide
分子量 formula_weight	267.1 kDa
来源方法 src_method	syn
拷贝数 entity_count	2

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7. 引用文献 (1)

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晶胞边长 a length_a	1.000 Å
晶胞边长 b length_b	1.000 Å
晶胞边长 c length_c	1.000 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	—

空间群 space_group	P 1
空间群编号 int_tables_number	1
晶系 crystal_system	—

分辨率 resolution	3.000 Å
最低分辨率 resolution_low	— Å
R 因子 r_factor	—
R_work r_work	—
R_free r_free	—

分辨率 resolution	3.00 Å
分辨率测定方法 resolution_method	—
颗粒数 num_particles	118562

fit	/app/data/saxs_computation/2b/22bd/22bd.fit
pddf	/app/data/pr_computation/2b/22bd/22bd.pr.out
profile	/app/data/saxs_computation/2b/22bd/22bd.dat

ICA-1103811 bound KCNQ2/3 heteromer with 2:2 stoichiometry

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

冷冻电镜 EM 3D

5. 实体与聚合体信息 (4)

Entity 1 polymer

聚合体 Polymer

来源 Source

Entity 2 polymer

聚合体 Polymer

来源 Source

Entity 3 non-polymer

Entity 4 non-polymer

7. 引用文献 (1)

8. 文件与曲线 (10)

Files (7)

Curves (3)