C-terminal, alpha helical domain of the Glutathione S-transferase family; Glutathione S-transferase (GST) family, C-terminal alpha helical domain; a large, diverse group of cytosolic dimeric proteins involved in cellular detoxification by catalyzing the conjugation of glutathione (GSH) with a wide range of endogenous and xenobiotic alkylating agents, including carcinogens, therapeutic drugs, environmental toxins and products of oxidative stress. In addition, GSTs also show GSH peroxidase activity and are involved in the synthesis of prostaglandins and leukotrienes. This family, also referred to as soluble GSTs, is the largest family of GSH transferases and is only distantly related to the mitochondrial GSTs (GSTK). Soluble GSTs bear no structural similarity to microsomal GSTs (MAPEG family) and display additional activities unique to their group, such as catalyzing thiolysis, reduction and isomerization of certain compounds. The GST fold contains an N-terminal thioredoxin-fold domain and a C-terminal alpha helical domain, with an active site located in a cleft between the two domains. GSH binds to the N-terminal domain while the hydrophobic substrate occupies a pocket in the C-terminal domain. Based on sequence similarity, different classes of GSTs have been identified, which display varying tissue distribution, substrate specificities and additional specific activities. In humans, GSTs display polymorphisms which may influence individual susceptibility to diseases such as cancer, arthritis, allergy and sclerosis. Some GST family members with non-GST functions include glutaredoxin 2, the CLIC subfamily of anion channels, prion protein Ure2p, crystallins, metaxins, stringent starvation protein A, and aminoacyl-tRNA synthetases.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 966936793  65 AEEKAIVQQWLEYRVTQIDGHSSKNDIHTLLKDLNSYLEDKVYLTGYNFTLADILLYYGLHRFI 128
Cdd:cd10305    1 AEERAQVDQWLEYRVTQVAPASDKADAKSLLKELNSYLQDRTYLVGHKLTLADVVLYYGLHPIM 64

Glutathione S-transferase C-terminal-like, alpha helical domain of Aminoacyl tRNA synthetase complex-Interacting Multifunctional Protein 3; Glutathione S-transferase (GST) C-terminal domain family, Aminoacyl tRNA synthetase complex-Interacting Multifunctional Protein (AIMP) 3 subfamily; AIMPs are non-enzymatic cofactors that play critical roles in the assembly and formation of a macromolecular multi-tRNA synthetase protein complex that functions as a molecular hub to coordinate protein synthesis. There are three AIMPs, named AIMP1-3, which play diverse regulatory roles. AIMP3, also called p18 or eukaryotic translation elongation factor 1 epsilon-1 (EEF1E1), contains a C-terminal domain with similarity to the C-terminal alpha helical domain of GSTs. It specifically interacts with methionyl-tRNA synthetase (MetRS) and is translocated to the nucleus during DNA synthesis or in response to DNA damage and oncogenic stress. In the nucleus, it interacts with ATM and ATR, which are upstream kinase regulators of p53. It appears to work against DNA damage in cooperation with AIMP2, and similar to AIMP2, AIMP3 is also a haploinsufficient tumor suppressor. AIMP3 transgenic mice have shorter lifespans than wild-type mice and they show characteristics of progeria, suggesting that AIMP3 may also be involved in cellular and organismal aging.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 966936793  65 AEEKAIVQQWLEYRVTQIDGHSSKNDIHTLLKDLNSYLEDKVYLTGYNFTLADILLYYGLHRFI 128
Cdd:cd10305    1 AEERAQVDQWLEYRVTQVAPASDKADAKSLLKELNSYLQDRTYLVGHKLTLADVVLYYGLHPIM 64

Glutathione S-transferase [Posttranslational modification, protein turnover, chaperones];

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 966936793  28 RQIPVLQtNNGPSLTGLTTIAAHLVKQANKEYLLGSTAEEKAIVQQWLEY-----------RVTQIDGHSS-------KN 89
Cdd:COG0625   51 GKVPVLV-DDGLVLTESLAILEYLAERYPEPPLLPADPAARARVRQWLAWadgdlhpalrnLLERLAPEKDpaaiaraRA 129

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|...
gi 966936793  90 DIHTLLKDLNSYLEDKVYLTGYNFTLADILLYYGLHRFIFMQV 132
Cdd:COG0625  130 ELARLLAVLEARLAGGPYLAGDRFSIADIALAPVLRRLDRLGL 172

Glutathione S-transferase C-terminal-like, alpha helical domain of Aminoacyl tRNA synthetase complex-Interacting Multifunctional Protein 3; Glutathione S-transferase (GST) C-terminal domain family, Aminoacyl tRNA synthetase complex-Interacting Multifunctional Protein (AIMP) 3 subfamily; AIMPs are non-enzymatic cofactors that play critical roles in the assembly and formation of a macromolecular multi-tRNA synthetase protein complex that functions as a molecular hub to coordinate protein synthesis. There are three AIMPs, named AIMP1-3, which play diverse regulatory roles. AIMP3, also called p18 or eukaryotic translation elongation factor 1 epsilon-1 (EEF1E1), contains a C-terminal domain with similarity to the C-terminal alpha helical domain of GSTs. It specifically interacts with methionyl-tRNA synthetase (MetRS) and is translocated to the nucleus during DNA synthesis or in response to DNA damage and oncogenic stress. In the nucleus, it interacts with ATM and ATR, which are upstream kinase regulators of p53. It appears to work against DNA damage in cooperation with AIMP2, and similar to AIMP2, AIMP3 is also a haploinsufficient tumor suppressor. AIMP3 transgenic mice have shorter lifespans than wild-type mice and they show characteristics of progeria, suggesting that AIMP3 may also be involved in cellular and organismal aging.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 966936793  65 AEEKAIVQQWLEYRVTQIDGHSSKNDIHTLLKDLNSYLEDKVYLTGYNFTLADILLYYGLHRFI 128
Cdd:cd10305    1 AEERAQVDQWLEYRVTQVAPASDKADAKSLLKELNSYLQDRTYLVGHKLTLADVVLYYGLHPIM 64

glutamate-tRNA ligase

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 966936793  30 IPVLQTNNGPSLTGLTTIAAHLVKQANKEYLLGSTAEEKAIVQQWLEYRVTQIDGHSSKNDIHTllkdLNSYLEDKVYLT 109
Cdd:PLN02907  38 APTLLFSSGEKLTGTNVLLRYIARSASLPGFYGQDAFESSQVDEWLDYAPTFSSGSEFENACEY----VDGYLASRTFLV 113

                         90
                 ....*....|....*.
gi 966936793 110 GYNFTLADILLYYGLH 125
Cdd:PLN02907 114 GYSLTIADIAIWSGLA 129

Glutathione S-transferase C-terminal-like, alpha helical domain of the Gamma subunit of Elongation Factor 1B and similar proteins; Glutathione S-transferase (GST) C-terminal domain family, Gamma subunit of Elongation Factor 1B (EF1Bgamma) subfamily; EF1Bgamma is part of the eukaryotic translation elongation factor-1 (EF1) complex which plays a central role in the elongation cycle during protein biosynthesis. EF1 consists of two functionally distinct units, EF1A and EF1B. EF1A catalyzes the GTP-dependent binding of aminoacyl-tRNA to the ribosomal A site concomitant with the hydrolysis of GTP. The resulting inactive EF1A:GDP complex is recycled to the active GTP form by the guanine-nucleotide exchange factor EF1B, a complex composed of at least two subunits, alpha and gamma. Metazoan EFB1 contain a third subunit, beta. The EF1B gamma subunit contains a GST fold consisting of an N-terminal thioredoxin-fold domain and a C-terminal alpha helical domain. The GST-like domain of EF1Bgamma is believed to mediate the dimerization of the EF1 complex, which in yeast is a dimer of the heterotrimer EF1A:EF1Balpha:EF1Bgamma. In addition to its role in protein biosynthesis, EF1Bgamma may also display other functions. The recombinant rice protein has been shown to possess GSH conjugating activity. The yeast EF1Bgamma binds to membranes in a calcium dependent manner and is also part of a complex that binds to the msrA (methionine sulfoxide reductase) promoter suggesting a function in the regulation of its gene expression. Also included in this subfamily is the GST_C-like domain at the N-terminus of human valyl-tRNA synthetase (ValRS) and its homologs. Metazoan ValRS forms a stable complex with Elongation Factor-1H (EF-1H), and together, they catalyze consecutive steps in protein biosynthesis, tRNA aminoacylation and its transfer to EF.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 966936793  67 EKAIVQQWLEYRVTQIDGHS--------------------SKNDIHTLLKDLNSYLEDKVYLTGYNFTLADILLYYGLHR 126
Cdd:cd03181    1 EAAQVLQWISFANSELLPAAatwvlpllgiapynkkavdkAKEDLKRALGVLEEHLLTRTYLVGERITLADIFVASALLR 80

                 ....*..
gi 966936793 127 FiFMQVL 133
Cdd:cd03181   81 G-FETVL 86

Glutathione S-transferase C-terminal-like, alpha helical domain of the Aminoacyl tRNA synthetase cofactor 1 and similar proteins; Glutathione S-transferase (GST) C-terminal domain family, Aminoacyl tRNA synthetase cofactor 1 (Arc1p)-like subfamily; Arc1p, also called GU4 nucleic binding protein 1 (G4p1) or p42, is a tRNA-aminoacylation and nuclear-export cofactor. It contains a domain in the N-terminal region with similarity to the C-terminal alpha helical domain of GSTs. This domain mediates the association of the aminoacyl tRNA synthetases (aaRSs), MetRS and GluRS, in yeast to form a stable stoichiometric ternany complex. The GST_C-like domain of Arc1p is a protein-protein interaction domain containing two binding sites which enable it to bind the two aaRSs simultaneously and independently. The MetRS-Arc1p-GluRS complex selectively recruits and aminoacylates its cognate tRNAs without additional cofactors. Arc1p also plays a role in the transport of tRNA from the nucleus to the cytoplasm. It may also control the subcellular distribution of GluRS in the cytoplasm, nucleoplasm, and the mitochondrial matrix.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 966936793  66 EEKAIVQQWLEYrvtqIDGHSSKNDIHTLLKDLNSYLEDKVYLTG-YNFTLADILLYYGLHRFI 128
Cdd:cd10304    2 EQSAEVAQWLSV----AKSGPVSKDVQETLGQLNLHLRTRTFLLGtGKPSVADVAVFEAVLPVV 61

glutathionine S-transferase; Provisional

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 966936793  29 QIPVLQTNNGPSLTGLTTIAAHLVKQANKEYLL---GSTAEEKAIvqQWLEYRVTQI-DGHS--------------SKND 90
Cdd:PRK10542  51 QVPALLLDDGTLLTEGVAIMQYLADSVPDRQLLapvGSLSRYHTI--EWLNYIATELhKGFTplfrpdtpeeykptVRAQ 128

                         90       100       110
                 ....*....|....*....|....*....|.
gi 966936793  91 IHTLLKDLNSYLEDKVYLTGYNFTLADILLY 121
Cdd:PRK10542 129 LEKKFQYVDEALADEQWICGQRFTIADAYLF 159

Glutathione S-transferase C-terminal-like, alpha helical domain of bifunctional Glutamyl-Prolyl-tRNA synthetase; Glutathione S-transferase (GST) C-terminal domain family, bifunctional GluRS-Prolyl-tRNA synthetase (GluProRS) subfamily; This model characterizes the GST_C-like domain found in the N-terminal region of GluProRS from higher eukaryotes. Aminoacyl-tRNA synthetases (aaRSs) comprise a family of enzymes that catalyze the coupling of amino acids with their matching tRNAs. This involves the formation of an aminoacyl adenylate using ATP, followed by the transfer of the activated amino acid to the 3'-adenosine moiety of the tRNA. AaRSs may also be involved in translational and transcriptional regulation, as well as in tRNA processing. The GST_C-like domain of GluProRS may be involved in protein-protein interactions, mediating the formation of the multi-aaRS complex in higher eukaryotes. The multi-aaRS complex acts as a molecular hub for protein synthesis. AaRSs from prokaryotes, which are active as dimers, do not contain this GST_C-like domain.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*
gi 966936793  71 VQQWLEYRVTQIdghSSKNDIHTLLKDLNSYLEDKVYLTGYNFTLADILLYYGLH 125
Cdd:cd10309    5 VDHWISFSAGRL---SCDQDFSSALSYLDKALSLRTYLVGNSLTLADFAVWAALR 56