Detailed entry information

Protein Information (annotations from UniProt)

Database IDHIV0011685
UniProt IDQ8NDV3
Primary gene name(s)SMC1B
Synonym gene name(s)SMC1L2
Protein nameStructural maintenance of chromosomes protein 1B
Protein functionMeiosis-specific component of cohesin complex. Required for the maintenance of meiotic cohesion, but not, or only to a minor extent, for its establishment. Contributes to axial element, AE formation and the organization of chromatin loops along the AE. Plays a key role in synapsis, recombination and chromosome movements. The cohesin complex is required for the cohesion of sister chromatids after DNA replication. The cohesin complex apparently forms a large proteinaceous ring within which sister chromatids can be trapped. At anaphase, the complex is cleaved and dissociates from chromatin, allowing sister chromatids to segregate. The meiosis-specific cohesin complex probably replaces mitosis specific cohesin complex when it dissociates from chromatin during prophase I, By similarity. {ECO:0000250}.
Subcellular locationNucleus. Chromosome {ECO:0000250}. Chromosome, centromere {ECO:0000250}. Note=Associates with chromatin. In prophase I stage of meiosis, localizes along the AE of synaptonemal complexes. In late-pachytene-diplotene, the bulk of protein dissociates from the chromosome arms probably because of phosphorylation by PLK, except at centromeres, where cohesin complexes remain. Remains chromatin associated at the centromeres up to metaphase II. At anaphase II, dissociates from centromeres, allowing chromosomes segregation, By similarity. {ECO:0000250}.
ECO codeClick here for more information.
Amino acid sequence
FASTA format: Q8NDV3
Gene Ontology
(Biological Process)
Complete annatation
meiotic nuclear division [GO:0007126];
sister chromatid cohesion [GO:0007062]
Gene Ontology
(Molecular Function)
Complete annatation
ATP binding [GO:0005524];
DNA binding [GO:0003677]
Gene Ontology
(Cellular Component)
Complete annatation
chromosome, centromeric region [GO:0000775];
cytoplasm [GO:0005737];
lateral element [GO:0000800];
meiotic cohesin complex [GO:0030893];
nuclear meiotic cohesin complex [GO:0034991];
nucleoplasm [GO:0005654]
Protein-protein interaction118018
Phylogenetic treeQ8NDV3
HIV replication factor status Zhou et al., Cell. Host. Microbe., 2008
Brass et al., Science, 2008
Smith et al., J. Immunol, 2010
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. CD31.592667350678380.002456986617826560.00792800306227402
AZA vs. DISUunknownunknownunknown
AZA vs. IL7unknownunknownunknown
AZA vs. SAHAunknownunknownunknown
DISU vs. CD3-1.968785844780650.0003036043156293690.00148781906820452
DISU vs. IL7unknownunknownunknown
DISU vs. SAHAunknownunknownunknown
DMSO vs. AZAunknownunknownunknown
DMSO vs. CD3-1.776302404437710.0003228705998385980.00126700848829604
DMSO vs. DISUunknownunknownunknown
DMSO vs. IL7unknownunknownunknown
DMSO vs. SAHAunknownunknownunknown
HIV vs. Mock in Activation-0.3966569763083120.7026850621350070.999983755607037
HIV vs. Mock in Latencyunknownunknownunknown
IL7 vs. CD3-0.6650278007794230.2333754078939890.362833428971382
SAHA vs. CD3-1.297946986884140.01232495733008810.03060927932835
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
NOTEST 0.471606 1
(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

not found

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

HIV Partner Interaction Type PubMed
Vpr downregulates 21875947

Metabolic/Signalling Pathway       (annotations from KEGG database)      top

Pathway Accession Number Description
hsa04110 Cell cycle - Homo sapiens (human)
hsa04114 Oocyte meiosis - Homo sapiens (human)