SASDAV6

Cysteine desulfurase IscS dimer

数据类型:SASBDB 实验数据 状态:Published 曲线类型:Single concentration 最后更新:2023-05-25T11:21:52.654103+02:00

Reduced levels of frataxin, an essential protein of as yet unknown function, are responsible for causing the neurodegenerative pathology Friedreich’s ataxia. Independent reports have linked frataxin to iron–sulphur cluster assembly through interactions with the two central components of this machinery: desulphurase Nfs1/IscS and the scaffold protein Isu/IscU. In this study, we use a combination of biophysical methods to define the structural bases of the interaction of CyaY (the bacterial orthologue of frataxin) with the IscS/IscU complex. We show that CyaY binds IscS as a monomer in a pocket between the active site and the IscS dimer interface. Recognition does not require iron and occurs through electrostatic interactions of complementary charged residues. Mutations at the complex interface affect the rates of enzymatic cluster formation. CyaY binding strengthens the affinity of the IscS/IscU complex. Our data suggest a new paradigm for understanding the role of frataxin as a regulator of IscS functions.

1. 样品、组分与实验条件 Sample & Experiment

样品 1 · Cysteine desulfurase IscS dimer

浓度— – 2.5 缓冲液 / pH20 mM Tris-HCl 150 mM NaCl 10 mM β-mercaptoethanol / 8.0
Experimental temperature15.0 设备 / 束线DORIS III, DESY / EMBL X33
波长0.15 nm曝光30.0 s × 4

分子组分

组分类型 / OrganismUniProt 与Construct寡聚状态Molecular weight
Cysteine desulfurase IscS
查看序列
KLPIYLDYSATTPVDPRVAEKMMQFMTMDGTFGNPASRSHRFGWQAEEAVDIARNQIADLVGADPREIVFTSGATESDNLAIKGAANFYQKKGKHIITSKTEHKAVLDTCRQLEREGFEVTYLAPQRNGIIDLKELEAAMRDDTILVSIMHVNNEIGVVQDIAAIGEMCRARGIIYHVDATQSVGKLPIDLSQLKVDLMSFSGHKIYGPKGIGALYVRRKPRVRIEAQMHGGGHERGMRSGTLPVHQIVGMGEAYRIAKEEMATEMERLRGLRNRLWNGIKDIEEVYLNGDLEHGAPNILNVSFNYVEGESLIMALKDLAVSSGSACTSASLEPSYVLRALGLNDELAHSSIRFSLGRFTTEEEIDYTIELVRKSIGRLRDLSPLWEMYKQ
proteinEscherichia coliP0A6B7—–—dimer分子数 243.597 kDa

实验曲线

曲线点数 / 列q range误差质量负强度点来源文件
12310[3]0.0774543–6.23701 1/nm含误差列缺失 0458sasbdb/entries/v6/sasdav6/source/SASDAV6.dat

2. SASBDB 报告的指标 Reported Results

指标方法数值误差单位
dmaxP(r)10.9nm
i0Guinier68.00.14
i0P(r)68.0
mwExperimental92.0kDa
mwGuinier I(0)92.0kDa
rgGuinier3.20.009nm
rgP(r)3.19nm

这些数值是 SASBDB 来源记录,不是 SAXSdb 对实验曲线重新计算的结果。

3. 来源拟合与模型 Source Fits & Models

4. 来源文件索引 Source Files

5. 实验说明与论文 Experiment & Publication

6. 完整来源记录 Complete Source Record

下列内容直接来自 SASBDB 条目。字段没有值时显示“—”;Not declared的单位不会由 SAXSdb 猜测。

打开 SASBDB 原始条目

缓冲液与样品属性

缓冲液名称20 mM Tris-HCl 150 mM NaCl 10 mM β-mercaptoethanol缓冲液浓度20.0 mM
pH8.0添加剂150 mM NaCl and 10 mM β-mercaptoethanol
缓冲液说明
纯度测定方法消光系数
吸收值散射对比度
比体积 / 干体积— / —混合物 / 氘代— / —

采集条件与仪器

测量日期2009-11-05储存 / 测量温度15.0 / 15.0
曝光时间30.0帧数4
波长0.15样品-探测器距离2.7
光源X-ray synchrotron探测器Pilatus 1M-W
机构 / 束线DORIS III, DESY / EMBL X33 · Hamburg, Germany
q range0.077 – 6.237样品体积 / 流速— / —

SASBDB 原始图

实验 I(q)
实验 I(q)
实验 I(q) log-log
实验 I(q) log-log
Guinier 图
Guinier 图
Kratky 图
Kratky 图
P(r) 图
P(r) 图

可Download文件

类别文件状态大小校验值Download与查看
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curve:来源记录
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full_entry_zip:来源记录与 ZIP 内部目录(6 项)
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pddf:来源记录
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sascif:来源记录
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全部来源字段(无筛选)

这里自动展开来源记录中的每一个字段,包括空值、列表成员和页面上方已展示过的字段。

summary.json:182 个字段值
字段路径原始值
codeSASDAV6
statusPublished
type_of_curveSingle concentration
angular_unit1/nm
project.titleStructural bases for the interaction of frataxin with the central components of iron-sulphur cluster assembly.
project.publication.titleStructural bases for the interaction of frataxin with the central components of iron-sulphur cluster assembly.
project.publication.author_listPrischi F, Konarev PV, Iannuzzi C, Pastore C, Adinolfi S, Martin SR, Svergun DI, Pastore A
project.publication.journalNat Commun
project.publication.doi10.1038/ncomms1097
project.publication.pmid20981023
project.publication.published_date2010 Oct 19
project.statusreleased
project.submitted_datenull
project.released_date2015-07-07
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experiment.instrument.detector.typeCustom-built
experiment.instrument.detector.namePilatus 1M-W
experiment.instrument.detector.resolution0.172
experiment.instrument.nameDORIS III, DESY
experiment.instrument.cityHamburg
experiment.instrument.countryGermany
experiment.instrument.beamline_nameEMBL X33
experiment.instrument.beam_geometry0.60
experiment.instrument.type_of_sourceX-ray synchrotron
experiment.instrument.point_sourcenull
experiment.instrument.line_collimationnull
experiment.instrument.sample_path_lengthnull
experiment.instrument.line_collimation_slitlengthnull
experiment.instrument.line_collimation_integrationwidthnull
experiment.instrument.xray_energynull
experiment.instrument.beam_profile_ahnull
experiment.instrument.beam_profile_alnull
experiment.sample.molecule[0].long_nameCysteine desulfurase IscS
experiment.sample.molecule[0].short_namenull
experiment.sample.molecule[0].sequenceKLPIYLDYSATTPVDPRVAEKMMQFMTMDGTFGNPASRSHRFGWQAEEAVDIARNQIADLVGADPREIVFTSGATESDNL AIKGAANFYQKKGKHIITSKTEHKAVLDTCRQLEREGFEVTYLAPQRNGIIDLKELEAAMRDDTILVSIMHVNNEIGVVQ DIAAIGEMCRARGIIYHVDATQSVGKLPIDLSQLKVDLMSFSGHKIYGPKGIGALYVRRKPRVRIEAQMHGGGHERGMRS GTLPVHQIVGMGEAYRIAKEEMATEMERLRGLRNRLWNGIKDIEEVYLNGDLEHGAPNILNVSFNYVEGESLIMALKDLA VSSGSACTSASLEPSYVLRALGLNDELAHSSIRFSLGRFTTEEEIDYTIELVRKSIGRLRDLSPLWEMYKQ
experiment.sample.molecule[0].organismEscherichia coli
experiment.sample.molecule[0].uniprot_codeP0A6B7
experiment.sample.molecule[0].uniprot_range_firstnull
experiment.sample.molecule[0].uniprot_range_lastnull
experiment.sample.molecule[0].oligomerizationdimer
experiment.sample.molecule[0].molecular_typeprotein
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experiment.sample.molecule[0].number_molecules2
experiment.sample.molecule[0].complex_statenull
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experiment.sample.molecule[0].molecule_sourcebiological
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experiment.sample.buffer.concentration_unitmM
experiment.sample.buffer.commentnull
experiment.sample.buffer.additive150 mM NaCl and 10 mM β-mercaptoethanol
experiment.sample.buffer.concentration20.0
experiment.sample.buffer.pkanull
experiment.sample.buffer.ph8.0
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experiment.sample.nameCysteine desulfurase IscS dimer
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experiment.sample.contrastnull
experiment.sample.specific_volnull
experiment.sample.dry_volnull
experiment.sample.absorbptionnull
experiment.sample.deuterationnull
experiment.sample.mixturenull
experiment.contributor[0].affiliation[0].short_nameEMBL-Hamburg
experiment.contributor[0].affiliation[0].addressNotkestraße 85, Geb. 25A, 22607 Hamburg, Deutschland, Germany
experiment.contributor[0].affiliation[0].full_nameEuropean Molecular Biology Laboratory (EMBL) - Hamburg outstation
experiment.contributor[0].affiliation[0].webpagehttp://www.embl-hamburg.de/index.php
experiment.contributor[0].contributor_namePetr
experiment.contributor[0].contributor_surnameKonarev
experiment.contributor[0].orcidnull
experiment.concentration_methodnull
experiment.concentration_unitnull
experiment.date2009-11-05
experiment.storage_temperature15.0
experiment.cell_temperature15.0
experiment.exposure_time30.0
experiment.number_of_frames4
experiment.wavelength0.15
experiment.sample_detector_distance2.7
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experiment.sample_volumenull
experiment.flow_ratenull
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experiment.total_exposure_timenull
experiment.seccolumnnull
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pddf_softwareATSAS GNOM
pddf_software_versionnull
i0_calibration_standardnull
descriptionReduced levels of frataxin, an essential protein of as yet unknown function, are responsible for causing the neurodegenerative pathology Friedreich’s ataxia. Independent reports have linked frataxin to iron–sulphur cluster assembly through interactions with the two central components of this machinery: desulphurase Nfs1/IscS and the scaffold protein Isu/IscU. In this study, we use a combination of biophysical methods to define the structural bases of the interaction of CyaY (the bacterial orthologue of frataxin) with the IscS/IscU complex. We show that CyaY binds IscS as a monomer in a pocket between the active site and the IscS dimer interface. Recognition does not require iron and occurs through electrostatic interactions of complementary charged residues. Mutations at the complex interface affect the rates of enzymatic cluster formation. CyaY binding strengthens the affinity of the IscS/IscU complex. Our data suggest a new paradigm for understanding the role of frataxin as a regulator of IscS functions.
experiment_descriptionnull
tags[0]X33
intensity_unitnull
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pddf_point_first54
pddf_point_last1134
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intensities_log_log_plotSASDAV6_datloglog_img.png
symmetrynull
last_modified2023-05-25T11:21:52.654103+02:00
bragg_peak[]
manifest.json:36 个字段值
字段路径原始值
codeSASDAV6
statussuccess
started_at2026-08-11T15:16:22.754285+00:00
finished_at2026-08-11T15:16:38.077705+00:00
source_last_modified2023-05-25T11:21:52.654103+02:00
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查看完整 summary.json 原文
{
  "code": "SASDAV6",
  "status": "Published",
  "type_of_curve": "Single concentration",
  "angular_unit": "1/nm",
  "project": {
    "title": "Structural bases for the interaction of frataxin with the central components of iron-sulphur cluster assembly.",
    "publication": {
      "title": "Structural bases for the interaction of frataxin with the central components of iron-sulphur cluster assembly.",
      "author_list": "Prischi F, Konarev PV, Iannuzzi C, Pastore C, Adinolfi S, Martin SR, Svergun DI, Pastore A",
      "journal": "Nat Commun",
      "doi": "10.1038/ncomms1097",
      "pmid": "20981023",
      "published_date": "2010 Oct 19"
    },
    "status": "released",
    "submitted_date": null,
    "released_date": "2015-07-07"
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            "address": "Notkestraße 85, Geb. 25A, 22607 Hamburg, Deutschland, Germany",
            "full_name": "European Molecular Biology Laboratory (EMBL) - Hamburg outstation",
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  "description": "Reduced levels of frataxin, an essential protein of as yet unknown function, are responsible for causing the neurodegenerative pathology Friedreich’s ataxia. Independent reports have linked frataxin to iron–sulphur cluster assembly through interactions with the two central components of this machinery: desulphurase Nfs1/IscS and the scaffold protein Isu/IscU. In this study, we use a combination of biophysical methods to define the structural bases of the\r\ninteraction of CyaY (the bacterial orthologue of frataxin) with the IscS/IscU complex. We show that CyaY binds IscS as a monomer in a pocket between the active site and the IscS dimer interface. Recognition does not require iron and occurs through electrostatic interactions of complementary charged residues. Mutations at the complex interface affect the rates of enzymatic cluster formation. CyaY binding strengthens the affinity of the IscS/IscU complex. Our data suggest a new paradigm for understanding the role of frataxin as a regulator of IscS functions.",
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  "last_modified": "2023-05-25T11:21:52.654103+02:00",
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}
查看完整 manifest.json 原文
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