Detailed entry information

Protein Information (annotations from UniProt)

Database IDHIV0013822
UniProt IDQ96CF2
Primary gene name(s)CHMP4C
Synonym gene name(s)SHAX3
Protein nameCharged multivesicular body protein 4c
Protein functionProbable core component of the endosomal sorting required for transport complex III, ESCRT-III which is involved in multivesicular bodies, MVBs formation and sorting of endosomal cargo proteins into MVBs. MVBs contain intraluminal vesicles, ILVs that are generated by invagination and scission from the limiting membrane of the endosome and mostly are delivered to lysosomes enabling degradation of membrane proteins, such as stimulated growth factor receptors, lysosomal enzymes and lipids. The MVB pathway appears to require the sequential function of ESCRT-O, -I,-II and -III complexes. ESCRT-III proteins mostly dissociate from the invaginating membrane before the ILV is released. The ESCRT machinery also functions in topologically equivalent membrane fission events, such as the terminal stages of cytokinesis and the budding of enveloped viruses, HIV-1 and other lentiviruses. Key component of the cytokinesis checkpoint, a process required to delay abscission to prevent both premature resolution of intercellular chromosome bridges and accumulation of DNA damage: upon phosphorylation by AURKB, together with ZFYVE19/ANCHR, retains abscission-competent VPS4, VPS4A and/or VPS4B at the midbody ring until abscission checkpoint signaling is terminated at late cytokinesis. Deactivation of AURKB results in dephosphorylation of CHMP4C followed by its dissociation from ANCHR and VPS4 and subsequent abscission, PubMed:22422861, PubMed:24814515. ESCRT-III proteins are believed to mediate the necessary vesicle extrusion and/or membrane fission activities, possibly in conjunction with the AAA ATPase VPS4. Involved in HIV-1 p6- and p9-dependent virus release. CHMP4A/B/C are required for the exosomal release of SDCBP, CD63 and syndecan, PubMed:22660413. {ECO:0000269|PubMed:14505569, ECO:0000269|PubMed:14505570, ECO:0000269|PubMed:14519844, ECO:0000269|PubMed:22422861, ECO:0000269|PubMed:22660413, ECO:0000269|PubMed:24814515}.
Subcellular locationCytoplasm, cytosol. Late endosome membrane {ECO:0000305};
Peripheral membrane protein {ECO:0000305}. Midbody. Note=Localizes to the midbody during cytokinesis. Phosphorylation at Ser-210 by AURKB triggers localization to Flemming body, PubMed:22422861. {ECO:0000269|PubMed:22422861}.
ECO codeClick here for more information.
Amino acid sequence
FASTA format: Q96CF2
Gene Ontology
(Biological Process)
Complete annatation
abscission [GO:0009838];
autophagy [GO:0006914];
cell separation after cytokinesis [GO:0000920];
endosomal transport [GO:0016197];
mitotic metaphase plate congression [GO:0007080];
multivesicular body assembly [GO:0036258];
negative regulation of cytokinesis [GO:0032466];
nucleus organization [GO:0006997];
positive regulation of viral release from host cell [GO:1902188];
protein transport [GO:0015031];
regulation of centrosome duplication [GO:0010824];
regulation of mitotic spindle assembly [GO:1901673];
regulation of viral process [GO:0050792];
ubiquitin-independent protein catabolic process via the multivesicular body sorting pathway [GO:0090611];
vacuolar transport [GO:0007034];
viral budding via host ESCRT complex [GO:0039702];
viral life cycle [GO:0019058]
Gene Ontology
(Molecular Function)
Complete annatation
unknown
Gene Ontology
(Cellular Component)
Complete annatation
unknown
Protein-protein interaction124946
Phylogenetic treeQ96CF2
HIV replication factor status Zhou et al., Cell. Host. Microbe., 2008
      unknown
Brass et al., Science, 2008
      unknown
Smith et al., J. Immunol, 2010
      unknown
Interferon-stimulated
gene status
Lu et al., J. Virol., 2011
      Folds changes 8h: unknown; Folds changes 16h: unknown; Tested: unknown;
Schoggins JW and Rice CM, Curr. Opin. Virol., 2011
      Targeted viruses: unknown
      Viral life cycle: unknown
      Mechanism related to antiviral activity: unknown
Anti-viral restriction factor Liu et al., Retrovirology, 2011
      unknown (Triplicates)

Gene Expression Profile       top

            Up-regulated;            Down-regulated

For brief introduction to each study, please go to the help page.

Gene expression during HIV latency

(1). Mohammadi et al., PLoS Pathog., 2014

Differentially expressed transcripts (Pairwise) during latency and subsequent viral reactivation using several agents - Primary CD4+ T-cell based model


DMSO: Dimethyl suloxyde (negative control) - 0.0033% final
SAHA: Vorinostat (Histone deacetylase inhibitor) - 0.5 μM
CD3: TCR Stimulation by IL-2+ antiCD3/anti-CD28 antibodies
IL7: Interleukin-7 based stimulation
DISU: Disulfiram (alcohol dehydrogenase inhibitor) - 0.5 μM
AZA: 5-azacytidine (AZA; DNA methylation inhibitor) - 1 μM
Experimental Condition Log2 Fold Change P value Adjusted P value
AZA vs. CD3unknownunknownunknown
AZA vs. DISUunknownunknownunknown
AZA vs. IL7unknownunknownunknown
AZA vs. SAHAunknownunknownunknown
DISU vs. CD3unknownunknownunknown
DISU vs. IL7unknownunknownunknown
DISU vs. SAHAunknownunknownunknown
DMSO vs. AZAunknownunknownunknown
DMSO vs. CD3unknownunknownunknown
DMSO vs. DISUunknownunknownunknown
DMSO vs. IL7unknownunknownunknown
DMSO vs. SAHAunknownunknownunknown
HIV vs. Mock in Activationunknownunknownunknown
HIV vs. Mock in Latencyunknownunknownunknown
IL7 vs. CD3unknownunknownunknown
SAHA vs. CD3unknownunknownunknown
SAHA vs. IL7unknownunknownunknown
(2). Iglesias-Ussel et al., J. Virol., 2013

Up and Downregulated transcripts during Latency (Latently infected CD4+ T cells vs Uninfected)- Primary CD4+Tcell based model
Log2 Fold Change P Value
unknown unknown

Gene expression during HIV infection and replication

(1). Imbeault et al., PloS Pathog., 2012

Transcriptomic profiling of HIV-1 infected CD4+ T cells - Primary CD4+ T cells
Experiment type Log2 Fold Change P Value Adjusted P Value
Infected vs. Mock unknown unknown unknown
Infected vs. Bystander unknown unknown unknown
(2). Lefebvre et al., J. Virol., 2011

Transcriptome analysis of T-cell line (Sup T1)
Log2 Fold Change unknown
(3). Li et al., J. Immunol., 2013

Lymphatic tissue
Acute Fold Change Acute P Value Asymt Fold Change Asypt P Value AIDS Fold Change AIDS P Value
unknown unknown unknown unknown unknown unknown
(4). Chang et al., MBio., 2011

Transcriptome analysis of T-cell line (Sup T1)

Derived from Sherrill-Mix et al., BMC Retrovirol., 2015 cross validation
Up-regulated (True) unknown
(5). Sherrill-Mix et al., BMC Retrovirol., 2015

Deep RNA-seq analysis of primary human T cell infected with low passage HIV isolate HIV89.6 - Primary CD4+ T cell based
Test Status Log2 Fold Change P Value
OK 1.09932 0.0219802
(6). Rotger et al., PLoS Pathog., 2010

Genome-wide mRNA expression of CD4+ T cells from HIV-infected patient
(Genes differentially expressed (at adjusted p<0.01) according to the empirical Bayes approach)
Log2 Fold Change P Value
unknown unknown

Proteomic/Transcriptomics studies indicating differentially expressed genes mediated by HIV

(1). Greenwood et al., Elife, 2016

Activated (CD3/CD28) Primary human CD4+ T cells infected with pNL4-3-dE-EGFP. The table shows the complete (unfiltered) TMT (tandem mass tag)-based proteomic time course dataset
6 h 24 h 48 h 72 h RTi
unknown unknown unknown unknown unknown
(2). Navare et al., Virology, 2012

SUP-T1 cell line
FC-4hpi P-value FC-8hpi P-value FC-20hpi P-value Category
unknown unknown unknown unknown unknown unknown unknown
(3). Hyrcza et al., J. Virolo., 2007

Primary human CD4+ and CD8+ T Cells
Affymetrix Prob ID Fold Change In CD8? Category
unknown unknown unknown unknown

Protein Overview       top

Drug-protein Interaction       (annotations from DrugBank)      top

not found

Protein Secondary Structure       (annotations from PDB)      top

PDB Accession Method Resolution Chain Structure Preview
3C3R X-ray 2.0Å B=221-233.

HIV-1 Interaction       (annotations from NCBI HIV-1 Interaction Database)      top

HIV Partner Interaction Type PubMed
p6 interacts with 14505569
14505570
14519844
p6 inhibited by 14505569
14505570
14519844
Pr55(Gag) co-localizes with 21394083
21494275
21762796
21762798
25099357
Pr55(Gag) interacts with 25099357

Metabolic/Signalling Pathway       (annotations from KEGG database)      top

Pathway Accession Number Description
hsa04144 Endocytosis - Homo sapiens (human)
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