Gene: SIX3

Basic information

Tag Content
Uniprot ID O95343; D6W5A5; Q53T42;
Entrez ID 6496
Genbank protein ID AAD15753.1; AAD51091.1; EAX00268.1; EAX00267.1; CAB42539.1; AAD11939.1; AAX93283.1;
Genbank nucleotide ID NM_005413.3
Ensembl protein ID ENSP00000260653
Ensembl nucleotide ID ENSG00000138083
Gene name Homeobox protein SIX3
Gene symbol SIX3
Organism Homo sapiens
NCBI taxa ID 9606
Cleft type
Developmental stage
Data sources Homology search
Reference
Functional description Transcriptional regulator which can act as both a transcriptional repressor and activator by binding a ATTA homeodomain core recognition sequence on these target genes. During forebrain development represses WNT1 expression allowing zona limitans intrathalamica formation and thereby ensuring proper anterio-posterior patterning of the diencephalon and formation of the rostral diencephalon. Acts as a direct upstream activator of SHH expression in the rostral diencephalon ventral midline and that in turn SHH maintains its expression. In addition, Six3 activity is required for the formation of the telencephalon. During postnatal stages of brain development is necessary for ependymal cell maturation by promoting the maturation of radial glia into ependymal cells through regulation of neuroblast proliferation and migration. Acts on the proliferation and differentiation of neural progenitor cells through activating transcription of CCND1 AND CCND2. During early lens formation plays a role in lens induction and specification by activating directly PAX6 in the presumptive lens ectoderm. In turn PAX6 activates SIX3 resulting in activation of PDGFRA and CCND1 promoting cell proliferation. Also is required for the neuroretina development by directly suppressing WNT8B expression in the anterior neural plate territory. Its action during retina development and lens morphogenesis is TLE5 and TLE4-dependent manner. Furthermore, during eye development regulates several genes expression. Before and during early lens development represses the CRYGF promoter by binding a SIX repressor element. Directly activates RHO transcription, or cooperates with CRX or NRL. Six3 functions also in the formation of the proximodistal axis of the optic cup, and promotes the formation of optic vesicles-like structures. During pituitary development, acts in parallel or alternatively with HESX1 to control cell proliferation through Wnt/beta-catenin pathway (By similarity). Plays a role in eye development by suppressing WNT1 expression and in dorsal-ventral patterning by repressing BMP signaling pathway.
Sequence
MVFRSPLDLY SSHFLLPNFA DSHHRSILLA SSGGGNGAGG GGGAGGGSGG GNGAGGGGAG 60
GAGGGGGGGS RAPPEELSMF QLPTLNFSPE QVASVCETLE ETGDIERLGR FLWSLPVAPG 120
ACEAINKHES ILRARAVVAF HTGNFRDLYH ILENHKFTKE SHGKLQAMWL EAHYQEAEKL 180
RGRPLGPVDK YRVRKKFPLP RTIWDGEQKT HCFKERTRSL LREWYLQDPY PNPSKKRELA 240
QATGLTPTQV GNWFKNRRQR DRAAAAKNRL QHQAIGPSGM RSLAEPGCPT HGSAESPSTA 300
ASPTTSVSSL TERADTGTSI LSVTSSDSEC DV 332

Abbreviation :
CLO : cleft lip only. CPO : cleft palate only. CLP : cleft lip and palate. CL/P : cleft lip with/without cleft palate.
For humans: CL/P, CLO, CPO, and CLP. For mice: CLO, CLP, and CPO.

Gene expression information

Gene expression in different tissues (GTEx V7)

  

Protein structural annotations

3D structure in PDB database

There is no related protein structure for this gene.

Protein disorder information

Orthologous information

Relation Gene symbol Entrez ID UniProt ID Cleft type Developmental stage Species Evidence Details
1:1 orthologSIX3616756E1BMT1Bos taurusPredictionMore>>
1:1 orthologSIX3102179678A0A452E3R7Capra hircusPredictionMore>>
1:1 orthologSIX36496O95343Homo sapiensPredictionMore>>
1:1 orthologSix320473Q62233CPOMus musculusPublicationMore>>
1:1 orthologSIX3470367H2QHU7Pan troglodytesPredictionMore>>
1:1 orthologSix3A0A0G2K2C0Rattus norvegicusPredictionMore>>
1:1 orthologsix3aQ6PCA5Danio rerioPredictionMore>>

Other genetic variants/mutations

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Disease or phenotype associated information

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Gene Ontology (GO)/biological pathways

GO:Molecular Function

GO ID GO Term Evidence
GO:0000976 transcription regulatory region sequence-specific DNA bindingIBA
GO:0000978 RNA polymerase II cis-regulatory region sequence-specific DNA bindingIDA
GO:0000981 DNA-binding transcription factor activity, RNA polymerase II-specificISA
GO:0000981 DNA-binding transcription factor activity, RNA polymerase II-specificISM
GO:0000981 DNA-binding transcription factor activity, RNA polymerase II-specificIBA
GO:0001222 transcription corepressor bindingIPI
GO:0001228 DNA-binding transcription activator activity, RNA polymerase II-specificIEA
GO:0003700 DNA-binding transcription factor activityISS
GO:0003713 transcription coactivator activityISS
GO:0005102 signaling receptor bindingIEA
GO:0005515 protein bindingIPI
GO:0042826 histone deacetylase bindingIEA

GO:Biological Process

GO ID GO Term Evidence
GO:0001654 eye developmentIDA
GO:0001654 eye developmentIBA
GO:0002070 epithelial cell maturationISS
GO:0002088 lens development in camera-type eyeISS
GO:0003404 optic vesicle morphogenesisISS
GO:0006606 protein import into nucleusIEA
GO:0007420 brain developmentIBA
GO:0007601 visual perceptionTAS
GO:0009946 proximal/distal axis specificationISS
GO:0014016 neuroblast differentiationISS
GO:0021537 telencephalon developmentISS
GO:0021797 forebrain anterior/posterior pattern specificationIEA
GO:0021798 forebrain dorsal/ventral pattern formationIDA
GO:0021846 cell proliferation in forebrainISS
GO:0021978 telencephalon regionalizationISS
GO:0021983 pituitary gland developmentISS
GO:0030178 negative regulation of Wnt signaling pathwayIEA
GO:0042127 regulation of cell population proliferationISS
GO:0045665 negative regulation of neuron differentiationISS
GO:0045892 negative regulation of transcription, DNA-templatedIDA
GO:0045892 negative regulation of transcription, DNA-templatedIBA
GO:0045944 positive regulation of transcription by RNA polymerase IIIEA
GO:0048512 circadian behaviorIEA
GO:0048856 anatomical structure developmentIBA
GO:0060235 lens induction in camera-type eyeIEA
GO:0061074 regulation of neural retina developmentISS
GO:0070306 lens fiber cell differentiationISS
GO:0097402 neuroblast migrationISS
GO:1901987 regulation of cell cycle phase transitionISS
GO:1902692 regulation of neuroblast proliferationISS
GO:1902742 apoptotic process involved in developmentISS
GO:1990086 lens fiber cell apoptotic processISS
GO:2000177 regulation of neural precursor cell proliferationISS

GO:Cellular Component

GO ID GO Term Evidence
GO:0000790 nuclear chromatinISA
GO:0005634 nucleusIBA
GO:0005667 transcription factor complexIBA

Reactome Pathway

Reactome ID Reactome Term Evidence

Drugs and compounds information

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Functional annotations

Keywords

Keyword ID Keyword Term
KW-0217 Developmental protein
KW-0225 Disease mutation
KW-0238 DNA-binding
KW-0370 Holoprosencephaly
KW-0371 Homeobox
KW-0539 Nucleus
KW-1185 Reference proteome
KW-0678 Repressor
KW-0804 Transcription
KW-0805 Transcription regulation

Interpro

InterPro ID InterPro Term
IPR009057 Homeobox-like_sf
IPR001356 Homeobox_dom
IPR031701 SIX1_SD
IPR032949 SIX3

PROSITE

PROSITE ID PROSITE Term
PS50071 HOMEOBOX_2

Pfam

Pfam ID Pfam Term
PF00046 Homeodomain
PF16878 SIX1_SD

Protein-protein interaction

Protein-miRNA interaction