Host Protein General Information (ID: PT0189)
  Protein Name
Antiapoptosis clone 11 protein (AAC-11)
  Gene Name
API5
  Host Species
Homo sapiens
  Uniprot Entry Name
API5_HUMAN
  Protein Families
API5 family
  Subcellular Location
Nucleus Cytoplasm
  External Link
NCBI Gene ID
8539
Uniprot ID
Q9BZZ5
Ensembl ID
ENSG00000166181
HGNC ID
HGNC:594
  Function in Host
Antiapoptotic factor that may have a role in proteinassembly. Negatively regulates ACIN1. By binding to ACIN1, itsuppresses ACIN1 cleavage from CASP3 and ACIN1-mediated DNAfragmentation. Also known to efficiently suppress E2F1-inducedapoptosis. Its depletion enhances the cytotoxic action of thechemotherapeutic drugs. [1-3]
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  3D Structure

Function of This Protein During Virus Infection
Virus NameSARS-COV-2 Protein Function Anti-viral [4]
Infected TissueLung Infection Time7-9 Days
Infected CellCalu-3 Cells (Human epithelial cell line) Cellosaurus IDCVCL_0609 
Method DescriptionTo detect the role of host protein API5 in viral infection, API5 protein knockout Calu-3 Cells were infected with SARS-COV-2 for 7 - 9 Days , and the effects on infection was detected through CRISPR-based genome-wide gene-knockout screen.
ResultsIt is reported that knockout of API5 increases SARS-CoV-2 RNA levels compared with control group.

 Full List of Virus RNA Interacting with This Protien
            RNA Region: Not Specified Virus Region (hCoV-19/England/02/2020 )
              RNA Region Details RNA Info Click to show the detail information of this RNA binding region [5]
              Strains Name
hCoV-19/England/02/2020
              Strains Family
Beta (B.1.351)
              RNA Binding Region
Not Specified Virus Region
              Virus Name
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
              Infection Cells Calu-3 cells (Human lung cancer cell)  (CVCL_0609 )
              Cell Originated Tissue Lung
              Infection Time 24 h
              Interaction Score P-adjust = 0.008
              Method Description UV protein-RNA crosslinking; RNA interactome capture (cRIC); RNA antisense purification coupled with mass spectrometry (RAP-MS)

Differential Gene Expression During SARS-COV-2 Infection
GEO Accession: GSE152641
Sample Type: Blood
Samples Details: Healthy Control: 24; COVID-19: 62
Platform: GPL24676 Illumina NovaSeq 6000
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GEO Accession: GSE162835
Sample Type: Nasopharyngeal Swabs
Samples Details: COVID-19 (Mild Symptoms): 37; COVID-19 (Moderate Symptoms): 10; COVID-19 (Severe Symptoms): 3
Platform: GPL24676 Illumina NovaSeq 6000
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GEO Accession: GSE175779
Sample Type: Human Bronchial Epithelial Cells
Samples Details: Healthy Control: 4 (0, 24, 48, 72 and 96 h); COVID-19: 4 (24, 48, 72 and 96 h)
Platform: GPL18573 Illumina NextSeq 500
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Protein Phosphorylation after Virus Infection
S464 [6]
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S464 [7]
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Protein Sequence Information
MPTVEELYRNYGILADATEQVGQHKDAYQVILDGVKGGTKEKRLAAQFIPKFFKHFPELADSAINAQLDLCEDEDVSIRRQAIKELPQFATGENLPRVADILTQLLQTDDSAEFNLVNNALLSIFKMDAKGTLGGLFSQILQGEDIVRERAIKFLSTKLKTLPDEVLTKEVEELILTESKKVLEDVTGEEFVLFMKILSGLKSLQTVSGRQQLVELVAEQADLEQTFNPSDPDCVDRLLQCTRQAVPLFSKNVHSTRFVTYFCEQVLPNLGTLTTPVEGLDIQLEVLKLLAEMSSFCGDMEKLETNLRKLFDKLLEYMPLPPEEAENGENAGNEEPKLQFSYVECLLYSFHQLGRKLPDFLTAKLNAEKLKDFKIRLQYFARGLQVYIRQLRLALQGKTGEALKTEENKIKVVALKITNNINVLIKDLFHIPPSYKSTVTLSWKPVQKVEIGQKRASEDTTSGSPPKKSSAGPKRDARQIYNPPSGKYSSNLGNFNYEQRGAFRGSRGGRGWGTRGNRSRGRLY
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References
1 The antiapoptotic protein AAC-11 interacts with and regulates Acinus-mediated DNA fragmentation. EMBO J. 2009 Jun 3;28(11):1576-88.
2 Functional identification of Api5 as a suppressor of E2F-dependent apoptosis in vivo. PLoS Genet. 2006 Nov 17;2(11):e196.
3 AAC-11 overexpression induces invasion and protects cervical cancer cells from apoptosis. Lab Invest. 2000 Apr;80(4):587-94.
4 Genome-wide CRISPR screens identify GATA6 as a proviral host factor for SARS-CoV-2 via modulation of ACE2. Nat Commun. 2022 Apr 25;13(1):2237.
5 Global analysis of protein-RNA interactions in SARS-CoV-2-infected cells reveals key regulators of infection. Mol Cell. 2021 Jul 1;81(13):2851-2867.e7.
6 The Global Phosphorylation Landscape of SARS-CoV-2 Infection. Cell. 2020 Aug 6;182(3):685-712.e19.
7 Multilevel proteomics reveals host perturbations by SARS-CoV-2 and SARS-CoV. Nature. 2021 Jun;594(7862):246-252.