ASpdb: an integrative knowledgebase of human protein isoforms from experimental and AI-predicted structures
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Center for Computational Systems Medicine
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Protein Summary

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AS Summary

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Protein Functional Features

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Gene Isoform Structures and Expression Levels

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Protein Structures

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pLDDT Score Distribution

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Ramachandran Plot of Protein Structures

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Potential Active Site Information

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Protein Structure and Feature Comparision

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Protein-Protein Interaction

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Related Drugs

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Related Diseases

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Clinically Important Variants

Protein:ISCU

Protein Summary

check button Gene summary
Gene name: ISCU
ASpdb.0 ID: 23479
Gene
Gene symbol

ISCU

Gene ID

23479

Gene nameiron-sulfur cluster assembly enzyme
Synonyms2310020H20Rik|HML|ISU2|NIFU|NIFUN|hnifU
Cytomap

12q23.3

Type of geneprotein-coding
Descriptioniron-sulfur cluster assembly enzyme ISCUIscU iron-sulfur cluster scaffold homologiron-sulfur cluster assembly enzyme ISCU, mitochondrialnifU-like N-terminal domain-containing protein
Modification date20240305
UniProtAcc

Q9H1K1


check button Gene ontology of this gene with evidence of Inferred from Direct Assay (IDA) from Entrez
PartnerGeneGO IDGO termPubMed ID
GeneISCU

GO:0005737

cytoplasm

11060020

GeneISCU

GO:0005739

mitochondrion

11060020|26702583

GeneISCU

GO:0005829

cytosol

16527810

GeneISCU

GO:0006879

intracellular iron ion homeostasis

16517407|23508953

GeneISCU

GO:0008270

zinc ion binding

30031876

GeneISCU

GO:0042803

protein homodimerization activity

29097656|34824239

GeneISCU

GO:0044571

[2Fe-2S] cluster assembly

23940031|24971490

GeneISCU

GO:0044572

[4Fe-4S] cluster assembly

23940031

GeneISCU

GO:0060090

molecular adaptor activity

16527810

GeneISCU

GO:0099128

mitochondrial iron-sulfur cluster assembly complex

21298097|31101807



AS Summary

check button Information of the canonical protein with experimentally identified structure from PDB (2023).
UniProt AccFile namePDB IDMethodResolutionChainStartEnd
Q9H1K1-1Q9H1K1-1_6uxe_D.pdb6UXEX-ray1.57D35159

check button ASpdb's canonical and alternatively spliced isoform information.
accession_idgene_namecanonical_idalternative_idcanonical_lengthalternative_lengthcanonical_startcanonical_endtypeoriginalSEQvariationSEQalternative_startalternative_end
Q9H1K1ISCUQ9H1K1-1Q9H1K1-2167142138SubstitutionMAAAGAFRLRRAASALLLRSPRLPARELSAPARLYHKKMVLIDMSVDLSTQ113

check buttonMultiple sequence alignment of our canonical and alternatively spliced ISCU

check button Matched gene isoform IDs with Ensembl and RefSeq of our canonical and alternative spliced genes of ISCU
UniProt-idENSGENSTENSP
Q9H1K1-1ENSG00000136003.16ENST00000311893.14ENSP00000310623.9
Q9H1K1-2ENSG00000136003.16ENST00000392807.8ENSP00000376554.4

UniProt-idNM IDNP ID
Q9H1K1-1NM_213595.3NP_998760.1
Q9H1K1-2NM_014301.4NP_055116.1

check buttonAmino acid sequences of our canonical and alternatively spliced ISCU
accession_idProtein sequence
Q9H1K1-1MAAAGAFRLRRAASALLLRSPRLPARELSAPARLYHKKVVDHYENPRNVGSLDKTSKNVGTGLVGAPACGDVMKLQIQVDEKGKIVDARF
Q9H1K1-2MVLIDMSVDLSTQVVDHYENPRNVGSLDKTSKNVGTGLVGAPACGDVMKLQIQVDEKGKIVDARFKTFGCGSAIASSSLATEWVKGKTVE

Protein Functional Features

check buttonMain function of this protein. (from UniProt)
ISCU (go to UniProt):Q9H1K1

check buttonRetention analysis result of protein across 39 protein features of UniProt such as six molecule processing features, 13 region features, four site features, six amino acid modification features, two natural variation features, five experimental info features, and 3 secondary structure features. Here, because of limited space for viewing, we only show the protein feature retention information belong to the 13 regional features. All retention annotation result can be downloaded at

download page

* Minus value of BPloci means that the break pointn is located before the CDS.
- Retained protein feature among the 13 regional features.
Accession_idSubsectionStartEndFuncitonal featureSplicing information


Gene Isoform Structures and Expression Levels for ISCU

check buttonGene structures of our canonical and alternative spliced genes of ISCU
* Click on the image to open the UCSC genome browser with custom track showing this image in a new window.
gene isoform structure of ISCU

check button Expression levels of gene isoforms across GTEx.
gtex expression

check button Expression levels of gene isoforms across TCGA.
tcga expression


Protein Structures

check button PDB and CIF files of the predicted protein structures
* Here we show the 3D structure of the proteins using Mol*. AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Model confidence is shown from the pLDDT values per residue. pLDDT corresponds to the model’s prediction of its score on the local Distance Difference Test. It is a measure of local accuracy (from AlphfaFold website). To color code individual residues, we transformed individual PDB files into CIF format.
3D view using mol* of Q9H1K1-1
3D view using mol* of Q9H1K1-2


pLDDT Score Distribution

check button pLDDT score distribution of the predicted protein structures from AlphaFold2
* AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100.
pLDDT distribution across the protein length of Q9H1K1-1
all structure
pLDDT distribution across the protein length of Q9H1K1-2
all structure


Ramachandran Plot of Protein Structures


check button Ramachandran plot of the torsional angles - phi (φ)and psi (ψ) - of the residues (amino acids) contained in this protein peptide.
Ramachandran plot of Q9H1K1-1
all structure
Ramachandran plot of Q9H1K1-2
all structure

Potential Active Site Information


check button The potential binding sites of these proteins were identified using SiteMap, a module of the Schrodinger suite.
UniProt-idSite scoreSizeD scoreVolumeExposureEnclosureContactPhobicPhilicBalanceDon/AccResidues
Q9H1K1-10.615280.5571.3440.6710.6220.910.40.9840.4061.75833,34,35,36,39,97,130,131,132,135
Q9H1K1-20.448180.35627.7830.6950.5040.7710.3471.0590.3272.14532,130,131,133,134,135

Protein Structure and Feature Comparision


check button Protein Structure Comparision Using Template Modeling Scores (TM-score).
all structure

check button Protein Structure Comparision Visualization with mol*. between Canonical predicted structure (AF2)(orange) vs Canonical validated structure (PDB)(green)
3D view using mol* of Q9H1K1-1_Q9H1K1-1_6uxe_D.pdb

check button Protein Structure Comparision Visualization with mol*. between Canonical validated structure (PDB)(orange) vs Alternative predicted structure (AF2)(green)
3D view using mol* of Q9H1K1-1_6uxe_D_Q9H1K1-2.pdb

check button Protein Structure Comparision Visualization with mol*. between Canonical predicted structure (AF2)(orange) vs Alternative predicted structure (AF2)(green)
3D view using mol* of Q9H1K1-1_Q9H1K1-2.pdb

check button Protein Feature Comparison of the protein sequendary structures among the protiens.
./stats/secondary_structure/figure/Q9H1K1-1_vs_Q9H1K1-2.png
all structure<

check button Protein Feature Comparison of the relative accessible surface area (ASA) among the protiens.
./stats/relative_asa/Q9H1K1-1_vs_Q9H1K1-2.png
all structure<


Protein-Protein Interaction


check button Interactors from UniProt.
Accession_idSubsectionStartEndFuncitonal featureSplicing information


check button Interactors from STRING.
Gene nameInteractors


Related Drugs to ISCU


check button Drugs targeting this gene/protein.
(DrugBank)
UniProt accessionGene nameDrugBank IDDrug nameDrug groupActions

Related Diseases to ISCU


check button Previous studies relating to the alternative splicing of ISCU and disease information from the MeSH term (PubMed)
GenePMIDTitleAbstractMeSH IDMeSH term


Clinically important variants in ISCU


check button (ClinVar, 04/20/2024)
accession_iduniprot_idgene_nameTypeVariantClinical_significance