SASDYW2

IgA1 dimer - Control

Data type: SASBDB experimental data Status: Published Curve type: Extrapolated to infinite dilution Last updated: 2026-05-27T14:18:49.190241+02:00

CAUTION: Errors associated with the scattering data points are not available.

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1. Samples, Components and Experimental Conditions Sample & Experiment

Sample 1 · IgA1 dimer - Control

Concentration0.33 – 1.31 Buffer / pH8.2 mM Na2HPO4, 1.5 mM KH2PO4, 137 mM NaCl, 2.6 mM KCl (PBS) / 7.4
Experimental temperature20.0 Facility / beamlineESRF / BM29
Wavelength0.09919 nmExposure1.0 s × 10

Molecular Components

ComponentType / organismUniProt and ConstructOligomeric StateMolecular weight
Human immunoglobulin IgA1
View sequence
>SP|CHAINSA,L,C,N|IMMUNOGLOBULINLIGHTCHAIN|HOMOSAPIENSDIVMTQSPLSLSVTPGEPASISCRSSQSLLRRDGHNDLEWYLQKPGQSPQPLIYLGSTRASGVPDRFSGSGSGTDFTLKIIRVEAEDAGTYYCMQNKQTPLTFGQGTRLEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC>SP|CHAINSB,M,D,O|IMMUNOGLOBULINHEAVYCHAIN|HOMOSAPIENSEVQLVESGGGLVQPGGSLKLSCAASGFTLSGSNVHWVRQASGKGLEWVGRIKRNAESDATAYAASMRGRLTISRDDSKNTAFLQMNSLKSDDTAMYYCVIRGDVYNRQWGQGTLVTVSSASPTSPKVFPLSLCSTQPDGNVVIACLVQGFFPQEPLSVTWSESGQGVTARNFPPSQDASGDLYTTSSQLTLPATQCLAGKSVTCHVKHYTNPSQDVTVPCPVPSTPPTPSPSTPPTPSPSCCHPRLSLHRPALEDLLLGSEANLTCTLTGLRDASGVTFTWTPSSGKSAVQGPPERDLCGCYSVSSVLPGCAEPWNHGKTFTCTAAYPESKTPLTATLSKSGNTFRPEVHLLPPPSEELALNELVTLTCLARGFSPKDVLVRWLQGSQELPREKYLTWASRQEPSQGTTTFAVTSILRVAAEDWKKGDTFSCMVGHEALPLAFTQKTIDRLAGKPTHVNVSVVMAEVDGTCY>SP|CHAINJ|IMMUNOGLOBULINJOININGCHAIN|HOMOSAPIENSEDERIVLVDNKCKCARITSRIIRSSEDPNEDIVERNIRIIVPLNNRENISDPTSPLRTRFVYHLSDLCKKCDPTEVELDNQIVTATQSNICDEDSATETCYTYDRNKCYTAVVPLVYGGETKMVETALTPDACYPD
protein———–—dimerMolecule count 2160.0 kDa

Experimental Curves

CurvePoints / columnsq rangeUncertainty qualityNegative-intensity pointsSource file
1296[3]0.103788–1.50238 1/nmHas uncertainty columnMissing 00sasbdb/entries/w2/sasdyw2/source/SASDYW2.dat
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2. Measurements Reported by SASBDB Reported Results

MetricMethodValueUncertaintyUnit
dmaxP(r)35.00.0nm
i0Guinier1.0—arbitrary
i0P(r)1.0340.002352arbitrary
mwExperimental319.0—kDa
rgGuinier8.6510.034nm
rgP(r)9.290.035nm

These values are reported by SASBDB; SAXSdb did not recalculate them from the experimental curve.

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3. Source Fits and Models Source Fits & Models

Fit 1 · Other SASSIE-web

χ²: —CorMap p: 0.0Unit: 1/nm

Curve fitting was performed using the online SASSIE-web portal: https://sassie-web.chem.utk.edu/sassie2/ The workflow for this atomistic modelling is described in: Perkins et al., (2016) J. Appl. Cryst. 49(6), 1861-1875. The modelled scattering curve was obtained using the 'golden vector' method, implemented in the SasCalc module in SASSIE-web, and described in: Watson and Curtis, (2013) J. Appl. Cryst. 46, 1171-1177.

ModelName / TypeSoftwareSymmetryModel MWPDB DeclarationSource file
1—mixCustom in-house —307.5—Model Image
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4. Source File Index Source Files

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5. Experiment Description and Publication Experiment & Publication

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6. Complete Source Record Complete Source Record

The following content comes directly from the SASBDB entry. Missing values are shown as “—”; SAXSdb does not infer undeclared units.

Open the original SASBDB entry

Buffer and Sample Properties

Buffer name8.2 mM Na2HPO4, 1.5 mM KH2PO4, 137 mM NaCl, 2.6 mM KCl (PBS)Buffer concentration—
pH7.4Additives—
Buffer description—
Purity measurement method—Extinction coefficient—
Absorbance—Scattering contrast—
Specific volume / dry volume— / —Mixture / deuteration— / —

Acquisition Conditions and Instrument

Measurement date2014-09-07Storage / measurement temperature20.0 / 20.0
Exposure time1.0Frames10
Wavelength0.09919Sample-to-detector distance2.867
SourceX-ray synchrotronDetectorPilatus 1M
Facility / beamlineESRF / BM29 · Grenoble, France
q range0.104 – 1.502Sample volume / flow rate— / —

Original SASBDB Plots

Experimental I(q)
Experimental I(q)
Experimental I(q), log-log
Experimental I(q), log-log
Guinier plot
Guinier plot
Kratky plot
Kratky plot
P(r) plot
P(r) plot

Downloadable Files

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All source fields (unfiltered)

Every source field is expanded here, including empty values, list members and fields already shown above.

summary.json:150 field values
Field pathRaw value
codeSASDYW2
statusPublished
type_of_curveExtrapolated to infinite dilution
angular_unit1/nm
project.titleAtomistic scattering modelling of the solution structure of human dimeric IgA1 reveals a structural and mechanistic basis for IgA nephropathy.
project.publication.titleAtomistic scattering modelling of the solution structure of human dimeric IgA1 reveals a structural and mechanistic basis for IgA nephropathy.
project.publication.author_listBhatt JS, Yeo SC, Ireland SM, Ben-Younis A, Gor J, Molyneux K, Barratt J, Perkins SJ
project.publication.journalJ Biol Chem
project.publication.doi10.1016/j.jbc.2026.113156
project.publication.pmid42140437
project.publication.published_date2026 May 14
project.statusreleased
project.submitted_date2025-11-29
project.released_date2026-05-27
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experiment.instrument.detector.resolution172.0
experiment.instrument.nameESRF
experiment.instrument.cityGrenoble
experiment.instrument.countryFrance
experiment.instrument.beamline_nameBM29
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experiment.sample.molecule[0].long_nameHuman immunoglobulin IgA1
experiment.sample.molecule[0].short_nameIgA1
experiment.sample.molecule[0].sequence>sp|Chains A,L,C,N|Immunoglobulin light chain|Homo sapiens DIVMTQSPLSLSVTPGEPASISCRSSQSLLRRDGHNDLEWYLQKPGQSPQPLIYLGSTRASGVPDRFSGSGSGTDFTLKIIRVEAEDAGTYYCMQNKQTPLTFGQGTRLEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC >sp|Chains B,M,D,O|Immunoglobulin heavy chain|Homo sapiens EVQLVESGGGLVQPGGSLKLSCAASGFTLSGSNVHWVRQASGKGLEWVGRIKRNAESDATAYAASMRGRLTISRDDSKNTAFLQMNSLKSDDTAMYYCVIRGDVYNRQWGQGTLVTVSSASPTSPKVFPLSLCSTQPDGNVVIACLVQGFFPQEPLSVTWSESGQGVTARNFPPSQDASGDLYTTSSQLTLPATQCLAGKSVTCHVKHYTNPSQDVTVPCPVPSTPPTPSPSTPPTPSPSCCHPRLSLHRPALEDLLLGSEANLTCTLTGLRDASGVTFTWTPSSGKSAVQGPPERDLCGCYSVSSVLPGCAEPWNHGKTFTCTAAYPESKTPLTATLSKSGNTFRPEVHLLPPPSEELALNELVTLTCLARGFSPKDVLVRWLQGSQELPREKYLTWASRQEPSQGTTTFAVTSILRVAAEDWKKGDTFSCMVGHEALPLAFTQKTIDRLAGKPTHVNVSVVMAEVDGTCY >sp|Chain J|Immunoglobulin joining chain|Homo sapiens EDERIVLVDNKCKCARITSRIIRSSEDPNEDIVERNIRIIVPLNNRENISDPTSPLRTRFVYHLSDLCKKCDPTEVELDNQIVTATQSNICDEDSATETCYTYDRNKCYTAVVPLVYGGETKMVETALTPDACYPD
experiment.sample.molecule[0].organismnull
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experiment.sample.molecule[0].oligomerizationdimer
experiment.sample.molecule[0].molecular_typeprotein
experiment.sample.molecule[0].uniprot_sequence
experiment.sample.molecule[0].mw160.0
experiment.sample.molecule[0].total_mw320.0
experiment.sample.molecule[0].number_molecules2
experiment.sample.molecule[0].complex_stateFalse
experiment.sample.molecule[0].deuterationnull
experiment.sample.molecule[0].molecule_sourcebiological
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experiment.sample.contrastnull
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experiment.sample.dry_volnull
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experiment.sample.deuterationnull
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experiment.cell_temperature20.0
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estimated_volume_methodnull
pddf_softwareATSAS GNOM
pddf_software_version4.6
i0_calibration_standardnull
descriptionCAUTION: Errors associated with the scattering data points are not available.
experiment_descriptionnull
tags[]
intensity_unitarbitrary
experimental_mw319.0
experimental_mw_errornull
guinier_i0_mwnull
guinier_i0_mw_errornull
porod_mwnull
porod_mw_errornull
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guinier_i01.0
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guinier_point_last15
pddf_point_firstnull
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i0_calibration_standard_datanull
intensities_log_log_plotSASDYW2_datloglog_img.png
symmetrynull
last_modified2026-05-27T14:18:49.190241+02:00
bragg_peak[]
manifest.json:34 field values
Field pathRaw value
codeSASDYW2
statussuccess
started_at2026-08-11T13:48:12.741021+00:00
finished_at2026-08-11T13:48:21.630016+00:00
source_last_modified2026-05-27T14:18:49.190241+02:00
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View the complete summary.json source
{
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  "status": "Published",
  "type_of_curve": "Extrapolated to infinite dilution",
  "angular_unit": "1/nm",
  "project": {
    "title": "Atomistic scattering modelling of the solution structure of human dimeric IgA1 reveals a structural and mechanistic basis for IgA nephropathy.",
    "publication": {
      "title": "Atomistic scattering modelling of the solution structure of human dimeric IgA1 reveals a structural and mechanistic basis for IgA nephropathy.",
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      "journal": "J Biol Chem",
      "doi": "10.1016/j.jbc.2026.113156",
      "pmid": "42140437",
      "published_date": "2026 May 14"
    },
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    "released_date": "2026-05-27"
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          "uniprot_sequence": "",
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        "name": "8.2 mM Na2HPO4, 1.5 mM KH2PO4, 137 mM NaCl, 2.6 mM KCl (PBS)",
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        "comment": null,
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      "name": "IgA1 dimer - Control",
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View the complete manifest.json source
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