UNC13D

Protein unc-13 homolog D, also known as munc13-4, is a protein that in humans is encoded by the UNC13D gene.[5]

UNC13D
Identifiers
Aliases	UNC13D, FHL3, HLH3, HPLH3, Munc13-4, unc-13 homolog D
External IDs	OMIM: 608897 MGI: 1917700 HomoloGene: 26714 GeneCards: UNC13D
Gene location (Human) Chr. Chromosome 17 (human)[1] Band 17q25.1 Start 75,827,225 bp[1] End 75,844,717 bp[1]
Gene location (Mouse) Chr. Chromosome 11 (mouse)[2] Band 11|11 E2 Start 116,062,095 bp[2] End 116,077,961 bp[2]
Gene ontology Molecular function • Rab GTPase binding • GO:0001948 protein binding Cellular component • cytoplasm • Weibel-Palade body • recycling endosome • endosome • late endosome • lysosome • exocytic vesicle • membrane • extracellular region • cytosol • azurophil granule lumen • endoplasmic reticulum • intracellular membrane-bounded organelle Biological process • natural killer cell degranulation • regulation of mast cell degranulation • germinal center formation • positive regulation of exocytosis • positive regulation of substrate adhesion-dependent cell spreading • defense response to virus • granuloma formation • positive regulation of regulated secretory pathway • phagocytosis • exocytosis • neutrophil degranulation Sources:Amigo / QuickGO
Orthologs
Species	Human	Mouse
Entrez	201294	70450
Ensembl	ENSG00000092929	ENSMUSG00000057948
UniProt	Q70J99	B2RUP2
RefSeq (mRNA)	NM_199242	NM_001009573
RefSeq (protein)	NP_954712	NP_001009573
Location (UCSC)	Chr 17: 75.83 – 75.84 Mb	Chr 11: 116.06 – 116.08 Mb
PubMed search	[3]	[4]
Wikidata
View/Edit Human View/Edit Mouse

Function

Munc13-4 is a member of the UNC13 family, containing similar domain structure as other family members but lacking an N-terminal phorbol ester-binding C1 domain present in other Munc13 proteins. The protein appears to play a role in vesicle maturation during exocytosis and is involved in regulation of cytolytic granules secretion.

Munc13-4 is an essential protein in the intracellular trafficking and exocytosis of lytic granules. It is targeted to CD63 positive secretory lysosomes. The C-terminal C2 domain of the protein is involved in this process.[6]

Clinical significance

Mutations in the UNC13D gene are associated with hemophagocytic lymphohistiocytosis type 3.[5]

References

1. GRCh38: Ensembl release 89: ENSG00000092929 - Ensembl, May 2017
2. GRCm38: Ensembl release 89: ENSMUSG00000057948 - Ensembl, May 2017
3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
5. "Entrez Gene: unc-13 homolog D (C. elegans)".
6. Elstak ED, Te Loo M, Tesselaar K, van Kerkhof P, Loeffen J, Grivas D, Hennekam E, Boelens JJ, Hoogerbrugge PM, van der Sluijs P, van Gijn ME, van de Corput L (July 2011). "A novel Dutch mutation in UNC13D reveals an essential role of the C2B domain in munc13-4 function". Pediatr Blood Cancer. 58 (4): 598–605. doi:10.1002/pbc.23253. PMID 21755595.

Further reading

• Marcenaro S, Gallo F, Martini S, et al. (2006). "Analysis of natural killer-cell function in familial hemophagocytic lymphohistiocytosis (FHL): defective CD107a surface expression heralds Munc13-4 defect and discriminates between genetic subtypes of the disease". Blood. 108 (7): 2316–23. doi:10.1182/blood-2006-04-015693. PMID 16778144.
• Gurgey A, Unal S, Okur H, et al. (2008). "Neonatal primary hemophagocytic lymphohistiocytosis in Turkish children". J. Pediatr. Hematol. Oncol. 30 (12): 871–6. doi:10.1097/MPH.0b013e31818a9577. PMID 19131769.
• Saxena SK, Horiuchi H, Fukuda M (2006). "Rab27a regulates epithelial sodium channel (ENaC) activity through synaptotagmin-like protein (SLP-5) and Munc13-4 effector mechanism". Biochem. Biophys. Res. Commun. 344 (2): 651–7. doi:10.1016/j.bbrc.2006.03.160. PMID 16630545.
• Neeft M, Wieffer M, de Jong AS, et al. (2005). "Munc13-4 is an effector of rab27a and controls secretion of lysosomes in hematopoietic cells". Mol. Biol. Cell. 16 (2): 731–41. doi:10.1091/mbc.E04-10-0923. PMC 545907. PMID 15548590.
• Ménager MM, Ménasché G, Romao M, et al. (2007). "Secretory cytotoxic granule maturation and exocytosis require the effector protein hMunc13-4". Nat. Immunol. 8 (3): 257–67. doi:10.1038/ni1431. PMID 17237785.
• Santoro A, Cannella S, Trizzino A, et al. (2008). "Mutations affecting mRNA splicing are the most common molecular defect in patients with familial hemophagocytic lymphohistiocytosis type 3". Haematologica. 93 (7): 1086–90. doi:10.3324/haematol.12622. PMID 18492689.
• Zhang K, Biroschak J, Glass DN, et al. (2008). "Macrophage activation syndrome in patients with systemic juvenile idiopathic arthritis is associated with MUNC13-4 polymorphisms". Arthritis Rheum. 58 (9): 2892–6. doi:10.1002/art.23734. PMC 2779064. PMID 18759271.
• Yoon HS, Kim HJ, Yoo KH, et al. (2010). "UNC13D is the predominant causative gene with recurrent splicing mutations in Korean patients with familial hemophagocytic lymphohistiocytosis". Haematologica. 95 (4): 622–6. doi:10.3324/haematol.2009.016949. PMC 2857192. PMID 20015888.
• Horne A, Ramme KG, Rudd E, et al. (2008). "Characterization of PRF1, STX11 and UNC13D genotype-phenotype correlations in familial hemophagocytic lymphohistiocytosis". Br. J. Haematol. 143 (1): 75–83. doi:10.1111/j.1365-2141.2008.07315.x. PMID 18710388.
• Zur Stadt U, Beutel K, Kolberg S, et al. (2006). "Mutation spectrum in children with primary hemophagocytic lymphohistiocytosis: molecular and functional analyses of PRF1, UNC13D, STX11, and RAB27A". Hum. Mutat. 27 (1): 62–8. doi:10.1002/humu.20274. PMID 16278825.
• Rudd E, Bryceson YT, Zheng C, et al. (2008). "Spectrum, and clinical and functional implications of UNC13D mutations in familial haemophagocytic lymphohistiocytosis". J. Med. Genet. 45 (3): 134–41. doi:10.1136/jmg.2007.054288. PMID 17993578.
• Beutler B (2009). "Microbe sensing, positive feedback loops, and the pathogenesis of inflammatory diseases". Immunol. Rev. 227 (1): 248–63. doi:10.1111/j.1600-065X.2008.00733.x. PMC 2713013. PMID 19120489.
• Nakao T, Shimizu T, Fukushima T, et al. (2008). "Fatal sibling cases of familial hemophagocytic lymphohistiocytosis (FHL) with MUNC13-4 mutations: case reports". Pediatr Hematol Oncol. 25 (3): 171–80. doi:10.1080/08880010801938082. PMID 18432499.
• Donn R, Ellison S, Lamb R, et al. (2008). "Genetic loci contributing to hemophagocytic lymphohistiocytosis do not confer susceptibility to systemic-onset juvenile idiopathic arthritis". Arthritis Rheum. 58 (3): 869–74. doi:10.1002/art.23270. PMC 2675009. PMID 18311812.
• Hazen MM, Woodward AL, Hofmann I, et al. (2008). "Mutations of the hemophagocytic lymphohistiocytosis-associated gene UNC13D in a patient with systemic juvenile idiopathic arthritis". Arthritis Rheum. 58 (2): 567–70. doi:10.1002/art.23199. PMID 18240215.
• Santoro A, Cannella S, Bossi G, et al. (2006). "Novel Munc13-4 mutations in children and young adult patients with haemophagocytic lymphohistiocytosis". J. Med. Genet. 43 (12): 953–60. doi:10.1136/jmg.2006.041863. PMC 2563207. PMID 16825436.
• Pivot-Pajot C, Varoqueaux F, de Saint Basile G, Bourgoin SG (2008). "Munc13-4 regulates granule secretion in human neutrophils". J. Immunol. 180 (10): 6786–97. doi:10.4049/jimmunol.180.10.6786. PMID 18453599.
• Wood SM, Meeths M, Chiang SC, et al. (2009). "Different NK cell-activating receptors preferentially recruit Rab27a or Munc13-4 to perforin-containing granules for cytotoxicity". Blood. 114 (19): 4117–27. doi:10.1182/blood-2009-06-225359. PMID 19704116.
• Zhong N, Radu G, Ju W, Brown WT (2005). "Novel progerin-interactive partner proteins hnRNP E1, EGF, Mel 18, and UBC9 interact with lamin A/C". Biochem. Biophys. Res. Commun. 338 (2): 855–61. doi:10.1016/j.bbrc.2005.10.020. PMID 16248985.
• Chang TY, Jaffray J, Woda B, et al. (2011). "Hemophagocytic lymphohistiocytosis with MUNC13-4 gene mutation or reduced natural killer cell function prior to onset of childhood leukemia". Pediatr Blood Cancer. 56 (5): 856–8. doi:10.1002/pbc.22846. PMC 3059114. PMID 21370424.

External links

• UNC13D+protein,+human at the US National Library of Medicine Medical Subject Headings (MeSH)

This article incorporates text from the United States National Library of Medicine, which is in the public domain.