PMID- 21984379 OWN - NLM STAT- MEDLINE DCOM- 20130617 LR - 20211020 IS - 1438-2199 (Electronic) IS - 0939-4451 (Print) IS - 0939-4451 (Linking) VI - 44 IP - 1 DP - 2013 Jan TI - Transglutaminase 6: a protein associated with central nervous system development and motor function. PG - 161-77 LID - 10.1007/s00726-011-1091-z [doi] AB - Transglutaminases (TG) form a family of enzymes that catalyse various post-translational modifications of glutamine residues in proteins and peptides including intra- and intermolecular isopeptide bond formation, esterification and deamidation. We have characterized a novel member of the mammalian TG family, TG6, which is expressed in a human carcinoma cell line with neuronal characteristics and in mouse brain. Besides full-length protein, alternative splicing results in a short variant lacking the second beta-barrel domain in man and a variant with truncated beta-sandwich domain in mouse. Biochemical data show that TG6 is allosterically regulated by Ca(2+) and guanine nucleotides. Molecular modelling indicates that TG6 could have Ca(2+) and GDP-binding sites related to those of TG3 and TG2, respectively. Localization of mRNA and protein in the mouse identified abundant expression of TG6 in the central nervous system. Analysis of its temporal and spatial pattern of induction in mouse development indicates an association with neurogenesis. Neuronal expression of TG6 was confirmed by double-labelling of mouse forebrain cells with cell type-specific markers. Induction of differentiation in mouse Neuro 2a cells with NGF or dibutyryl cAMP is associated with an upregulation of TG6 expression. Familial ataxia has recently been linked to mutations in the TGM6 gene. Autoantibodies to TG6 were identified in immune-mediated ataxia in patients with gluten sensitivity. These findings suggest a critical role for TG6 in cortical and cerebellar neurons. FAU - Thomas, Helen AU - Thomas H AD - Matrix Biology and Tissue Repair Research Unit, School of Dentistry, Cardiff University, Heath Park, Cardiff CF14 4XY, UK. FAU - Beck, Konrad AU - Beck K FAU - Adamczyk, Magdalena AU - Adamczyk M FAU - Aeschlimann, Pascale AU - Aeschlimann P FAU - Langley, Martin AU - Langley M FAU - Oita, Radu C AU - Oita RC FAU - Thiebach, Lars AU - Thiebach L FAU - Hils, Martin AU - Hils M FAU - Aeschlimann, Daniel AU - Aeschlimann D LA - eng SI - GENBANK/AF540969 SI - GENBANK/AF540970 SI - GENBANK/AY159126 SI - GENBANK/AY177606 SI - GENBANK/AY177607 GR - 18461/Arthritis Research UK/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20111008 PL - Austria TA - Amino Acids JT - Amino acids JID - 9200312 RN - 0 (Coenzymes) RN - 0 (Nucleotides) RN - EC 2.3.2.13 (TGM6 protein, human) RN - EC 2.3.2.13 (Transglutaminases) SB - IM MH - Animals MH - Catalytic Domain MH - Cell Differentiation MH - Cell Line MH - Central Nervous System/cytology/*embryology/*physiology MH - Coenzymes MH - Evolution, Molecular MH - Gene Expression MH - Gene Expression Regulation, Developmental MH - Humans MH - Kinetics MH - Mice MH - Mice, Inbred BALB C MH - Models, Molecular MH - Molecular Sequence Data MH - Neurons/enzymology/*physiology MH - Nucleotides/chemistry MH - Organ Specificity MH - Protein Binding MH - Protein Structure, Secondary MH - Substrate Specificity MH - Transglutaminases/antagonists & inhibitors/*genetics/metabolism PMC - PMC3535377 EDAT- 2011/10/11 06:00 MHDA- 2013/06/19 06:00 PMCR- 2011/10/08 CRDT- 2011/10/11 06:00 PHST- 2011/06/28 00:00 [received] PHST- 2011/09/16 00:00 [accepted] PHST- 2011/10/11 06:00 [entrez] PHST- 2011/10/11 06:00 [pubmed] PHST- 2013/06/19 06:00 [medline] PHST- 2011/10/08 00:00 [pmc-release] AID - 1091 [pii] AID - 10.1007/s00726-011-1091-z [doi] PST - ppublish SO - Amino Acids. 2013 Jan;44(1):161-77. doi: 10.1007/s00726-011-1091-z. Epub 2011 Oct 8.