UniProt functional annotation for Q9UMX1



	UniProt functional annotation for Q9UMX1

UniProt code: Q9UMX1.

Organism: Homo sapiens (Human).

Taxonomy: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.

Function: Negative regulator in the hedgehog/smoothened signaling pathway (PubMed:10559945, PubMed:10564661, PubMed:10806483, PubMed:12068298, PubMed:12975309, PubMed:27234298, PubMed:15367681, PubMed:22365972, PubMed:24217340, PubMed:24311597, PubMed:28965847). Down-regulates GLI1-mediated transactivation of target genes (PubMed:15367681, PubMed:24217340, PubMed:24311597). Down-regulates GLI2-mediated transactivation of target genes (PubMed:24311597, PubMed:24217340). Part of a corepressor complex that acts on DNA-bound GLI1. May also act by linking GLI1 to BTRC and thereby targeting GLI1 to degradation by the proteasome (PubMed:10559945, PubMed:10564661, PubMed:10806483, PubMed:24217340). Sequesters GLI1, GLI2 and GLI3 in the cytoplasm, this effect is overcome by binding of STK36 to both SUFU and a GLI protein (PubMed:10559945, PubMed:10564661, PubMed:10806483, PubMed:24217340). Negative regulator of beta-catenin signaling (By similarity). Regulates the formation of either the repressor form (GLI3R) or the activator form (GLI3A) of the full-length form of GLI3 (GLI3FL) (PubMed:24311597, PubMed:28965847). GLI3FL is complexed with SUFU in the cytoplasm and is maintained in a neutral state (PubMed:24311597, PubMed:28965847). Without the Hh signal, the SUFU- GLI3 complex is recruited to cilia, leading to the efficient processing of GLI3FL into GLI3R (PubMed:24311597, PubMed:28965847). When Hh signaling is initiated, SUFU dissociates from GLI3FL and the latter translocates to the nucleus, where it is phosphorylated, destabilized, and converted to a transcriptional activator (GLI3A) (PubMed:24311597, PubMed:28965847). Required for normal embryonic development (By similarity). Required for the proper formation of hair follicles and the control of epidermal differentiation (By similarity). {ECO:0000250|UniProtKB:Q9Z0P7, ECO:0000269|PubMed:10559945, ECO:0000269|PubMed:10564661, ECO:0000269|PubMed:10806483, ECO:0000269|PubMed:12068298, ECO:0000269|PubMed:12975309, ECO:0000269|PubMed:15367681, ECO:0000269|PubMed:22365972, ECO:0000269|PubMed:24217340, ECO:0000269|PubMed:24311597, ECO:0000269|PubMed:27234298, ECO:0000269|PubMed:28965847}.

Subunit: May form homodimers (PubMed:10564661). Part of a DNA-bound corepressor complex containing SAP18, GLI1 and SIN3 (By similarity). Part of a complex containing CTNNB1 (By similarity). Binds BTRC, GLI2, GLI3, SAP18 and STK36 (PubMed:10564661, PubMed:10806483). Binds both free and DNA-bound GLI1 (PubMed:10559945, PubMed:15367681, PubMed:24217340, PubMed:24311597, PubMed:28965847). Interacts with KIF7 (By similarity). Interacts with GLI3FL and this interaction regulates the formation of either repressor or activator forms of GLI3 (PubMed:24311597, PubMed:28965847). Its association with GLI3FL is regulated by Hh signaling and dissociation of the SUFU-GLI3 interaction requires the presence of the ciliary motor KIF3A (PubMed:24311597, PubMed:28965847). Interacts with ULK3; inactivating the protein kinase activity of ULK3 (PubMed:20643644). Interacts with RAB23 (PubMed:22365972). {ECO:0000250|UniProtKB:Q9Z0P7, ECO:0000269|PubMed:10559945, ECO:0000269|PubMed:10564661, ECO:0000269|PubMed:10806483, ECO:0000269|PubMed:15367681, ECO:0000269|PubMed:20643644, ECO:0000269|PubMed:22365972, ECO:0000269|PubMed:24217340, ECO:0000269|PubMed:24311597, ECO:0000269|PubMed:28965847}.

Subcellular location: Cytoplasm {ECO:0000269|PubMed:10559945, ECO:0000269|PubMed:28965847}. Nucleus {ECO:0000269|PubMed:10559945, ECO:0000269|PubMed:28965847}.

Tissue specificity: Ubiquitous in adult tissues. Detected in osteoblasts of the perichondrium in the developing limb of 12-week old embryos. Isoform 1 is detected in fetal brain, lung, kidney and testis. Isoform 2 is detected in fetal testis, and at much lower levels in fetal brain, lung and kidney. {ECO:0000269|PubMed:10559945, ECO:0000269|PubMed:10564661}.

Ptm: Polyubiquitinated at Lys-257 by the SCF(FBXL17) complex, leading to its subsequent degradation and allowing the release of GLI1 for proper hedgehog/smoothened signal transduction (PubMed:27234298). Ubiquitination is impaired by phosphorylation at Ser-342, Ser-346, Ser- 352 and Thr-353 (PubMed:27234298). {ECO:0000269|PubMed:27234298}.

Ptm: Phosphorylation at Ser-342, Ser-346, Ser-352 and Thr-353 prevents ubiquitination by the SCF(FBXL17) complex. {ECO:0000269|PubMed:27234298}.

Disease: Medulloblastoma (MDB) [MIM:155255]: Malignant, invasive embryonal tumor of the cerebellum with a preferential manifestation in children. {ECO:0000269|PubMed:12068298}. Note=The disease is caused by variants affecting the gene represented in this entry.

Disease: Joubert syndrome 32 (JBTS32) [MIM:617757]: A form of Joubert syndrome, a disorder presenting with cerebellar ataxia, oculomotor apraxia, hypotonia, neonatal breathing abnormalities and psychomotor delay. Neuroradiologically, it is characterized by cerebellar vermian hypoplasia/aplasia, thickened and reoriented superior cerebellar peduncles, and an abnormally large interpeduncular fossa, giving the appearance of a molar tooth on transaxial slices (molar tooth sign). Additional variable features include retinal dystrophy, renal disease, liver fibrosis, and polydactyly. JBTS32 inheritance is autosomal recessive. {ECO:0000269|PubMed:28965847}. Note=The disease is caused by variants affecting the gene represented in this entry.

Disease: Basal cell nevus syndrome (BCNS) [MIM:109400]: An autosomal dominant disease characterized by nevoid basal cell carcinomas and developmental abnormalities such as rib and craniofacial alterations, polydactyly, syndactyly, and spina bifida. In addition, the patients suffer from a multitude of tumors like basal cell carcinomas, fibromas of the ovaries and heart, cysts of the skin, jaws and mesentery, as well as medulloblastomas and meningiomas. {ECO:0000269|PubMed:19533801}. Note=The disease is caused by variants affecting the gene represented in this entry.

Miscellaneous: [Isoform 1]: Major isoform.

Similarity: Belongs to the SUFU family. {ECO:0000305}.

Annotations taken from UniProtKB at the EBI.


Organism:		Homo sapiens (Human).
Taxonomy:		Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.



Function:		Negative regulator in the hedgehog/smoothened signaling pathway (PubMed:10559945, PubMed:10564661, PubMed:10806483, PubMed:12068298, PubMed:12975309, PubMed:27234298, PubMed:15367681, PubMed:22365972, PubMed:24217340, PubMed:24311597, PubMed:28965847). Down-regulates GLI1-mediated transactivation of target genes (PubMed:15367681, PubMed:24217340, PubMed:24311597). Down-regulates GLI2-mediated transactivation of target genes (PubMed:24311597, PubMed:24217340). Part of a corepressor complex that acts on DNA-bound GLI1. May also act by linking GLI1 to BTRC and thereby targeting GLI1 to degradation by the proteasome (PubMed:10559945, PubMed:10564661, PubMed:10806483, PubMed:24217340). Sequesters GLI1, GLI2 and GLI3 in the cytoplasm, this effect is overcome by binding of STK36 to both SUFU and a GLI protein (PubMed:10559945, PubMed:10564661, PubMed:10806483, PubMed:24217340). Negative regulator of beta-catenin signaling (By similarity). Regulates the formation of either the repressor form (GLI3R) or the activator form (GLI3A) of the full-length form of GLI3 (GLI3FL) (PubMed:24311597, PubMed:28965847). GLI3FL is complexed with SUFU in the cytoplasm and is maintained in a neutral state (PubMed:24311597, PubMed:28965847). Without the Hh signal, the SUFU- GLI3 complex is recruited to cilia, leading to the efficient processing of GLI3FL into GLI3R (PubMed:24311597, PubMed:28965847). When Hh signaling is initiated, SUFU dissociates from GLI3FL and the latter translocates to the nucleus, where it is phosphorylated, destabilized, and converted to a transcriptional activator (GLI3A) (PubMed:24311597, PubMed:28965847). Required for normal embryonic development (By similarity). Required for the proper formation of hair follicles and the control of epidermal differentiation (By similarity). {ECO:0000250\|UniProtKB:Q9Z0P7, ECO:0000269\|PubMed:10559945, ECO:0000269\|PubMed:10564661, ECO:0000269\|PubMed:10806483, ECO:0000269\|PubMed:12068298, ECO:0000269\|PubMed:12975309, ECO:0000269\|PubMed:15367681, ECO:0000269\|PubMed:22365972, ECO:0000269\|PubMed:24217340, ECO:0000269\|PubMed:24311597, ECO:0000269\|PubMed:27234298, ECO:0000269\|PubMed:28965847}.


Subunit:		May form homodimers (PubMed:10564661). Part of a DNA-bound corepressor complex containing SAP18, GLI1 and SIN3 (By similarity). Part of a complex containing CTNNB1 (By similarity). Binds BTRC, GLI2, GLI3, SAP18 and STK36 (PubMed:10564661, PubMed:10806483). Binds both free and DNA-bound GLI1 (PubMed:10559945, PubMed:15367681, PubMed:24217340, PubMed:24311597, PubMed:28965847). Interacts with KIF7 (By similarity). Interacts with GLI3FL and this interaction regulates the formation of either repressor or activator forms of GLI3 (PubMed:24311597, PubMed:28965847). Its association with GLI3FL is regulated by Hh signaling and dissociation of the SUFU-GLI3 interaction requires the presence of the ciliary motor KIF3A (PubMed:24311597, PubMed:28965847). Interacts with ULK3; inactivating the protein kinase activity of ULK3 (PubMed:20643644). Interacts with RAB23 (PubMed:22365972). {ECO:0000250\|UniProtKB:Q9Z0P7, ECO:0000269\|PubMed:10559945, ECO:0000269\|PubMed:10564661, ECO:0000269\|PubMed:10806483, ECO:0000269\|PubMed:15367681, ECO:0000269\|PubMed:20643644, ECO:0000269\|PubMed:22365972, ECO:0000269\|PubMed:24217340, ECO:0000269\|PubMed:24311597, ECO:0000269\|PubMed:28965847}.
Subcellular location:		Cytoplasm {ECO:0000269\|PubMed:10559945, ECO:0000269\|PubMed:28965847}. Nucleus {ECO:0000269\|PubMed:10559945, ECO:0000269\|PubMed:28965847}.
Tissue specificity:		Ubiquitous in adult tissues. Detected in osteoblasts of the perichondrium in the developing limb of 12-week old embryos. Isoform 1 is detected in fetal brain, lung, kidney and testis. Isoform 2 is detected in fetal testis, and at much lower levels in fetal brain, lung and kidney. {ECO:0000269\|PubMed:10559945, ECO:0000269\|PubMed:10564661}.
Ptm:		Polyubiquitinated at Lys-257 by the SCF(FBXL17) complex, leading to its subsequent degradation and allowing the release of GLI1 for proper hedgehog/smoothened signal transduction (PubMed:27234298). Ubiquitination is impaired by phosphorylation at Ser-342, Ser-346, Ser- 352 and Thr-353 (PubMed:27234298). {ECO:0000269\|PubMed:27234298}.
Ptm:		Phosphorylation at Ser-342, Ser-346, Ser-352 and Thr-353 prevents ubiquitination by the SCF(FBXL17) complex. {ECO:0000269\|PubMed:27234298}.
Disease:		Medulloblastoma (MDB) [MIM:155255]: Malignant, invasive embryonal tumor of the cerebellum with a preferential manifestation in children. {ECO:0000269\|PubMed:12068298}. Note=The disease is caused by variants affecting the gene represented in this entry.
Disease:		Joubert syndrome 32 (JBTS32) [MIM:617757]: A form of Joubert syndrome, a disorder presenting with cerebellar ataxia, oculomotor apraxia, hypotonia, neonatal breathing abnormalities and psychomotor delay. Neuroradiologically, it is characterized by cerebellar vermian hypoplasia/aplasia, thickened and reoriented superior cerebellar peduncles, and an abnormally large interpeduncular fossa, giving the appearance of a molar tooth on transaxial slices (molar tooth sign). Additional variable features include retinal dystrophy, renal disease, liver fibrosis, and polydactyly. JBTS32 inheritance is autosomal recessive. {ECO:0000269\|PubMed:28965847}. Note=The disease is caused by variants affecting the gene represented in this entry.
Disease:		Basal cell nevus syndrome (BCNS) [MIM:109400]: An autosomal dominant disease characterized by nevoid basal cell carcinomas and developmental abnormalities such as rib and craniofacial alterations, polydactyly, syndactyly, and spina bifida. In addition, the patients suffer from a multitude of tumors like basal cell carcinomas, fibromas of the ovaries and heart, cysts of the skin, jaws and mesentery, as well as medulloblastomas and meningiomas. {ECO:0000269\|PubMed:19533801}. Note=The disease is caused by variants affecting the gene represented in this entry.
Miscellaneous:		[Isoform 1]: Major isoform.
Similarity:		Belongs to the SUFU family. {ECO:0000305}.