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Search results 4301 to 4400 out of 202262 for *

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Category: OntologyTerm
Type Details Score
Ontology Term  
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Ontology Term
Description: This is a family of inositol-pentakisphosphate 2-kinases (EC 2.7.1.158) (also known as inositol 1,3,4,5,6-pentakisphosphate 2-kinase, Ins(1,3,4,5,6)P5 2-kinase) and InsP5 2-kinase). This enzyme phosphorylates Ins(1,3,4,5,6)P5 to form Ins(1,2,3,4,5,6)P6 (also known as InsP6 or phytate). InsP6 is involved in many processes such as mRNA export, nonhomologous end-joining, endocytosis and ion channel regulation.
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Description: NULL
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Description: This family of eukaryotic proteins includes 5' nucleotidase enzymes, such as purine 5'-nucleotidase EC:3.1.3.5.
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Description: This presumed domain is functionally uncharacterised. This domain family is found in bacteria, archaea and eukaryotes, and is approximately 70 amino acids in length. There is a single completely conserved residue G that may be functionally important.
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Description: The DNA-3-methyladenine glycosylase I is constitutively expressed and is specific for the alkylated 3-methyladenine DNA.
Ontology Term
Description: Hemopexin is a heme-binding protein that transports heme to the liver. Hemopexin-like repeats occur in vitronectin and some matrix metallopeptidases family (matrixins). The HX repeats of some matrixins bind tissue inhibitor of metallopeptidases (TIMPs).
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Description: This C-terminal domain of the SAP30 proteins appears to be the binding region for Sin3.
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Description: NULL
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Description: This family contains EGF domains found in a variety of extracellular proteins.
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Description: Members of this family are involved in long chain fatty acid elongation systems that produce the 26-carbon precursors for ceramide and sphingolipid synthesis [1]. Predicted to be integral membrane proteins, in eukaryotes they are probably located on the endoplasmic reticulum. Yeast ELO3 (Swiss:P40319) affects plasma membrane H+-ATPase activity, and may act on a glucose-signaling pathway that controls the expression of several genes that are transcriptionally regulated by glucose such as PMA1 [2].
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Description: This entry is the conserved middle and C-terminus of the Sec3 protein. Sec3 binds to the C-terminal cytoplasmic domain of GLYT1 (glycine transporter protein 1). Sec3 is the exocyst component that is closest to the plasma membrane docking site and it serves as a spatial landmark in the plasma membrane for incoming secretory vesicles. Sec3 is recruited to the sites of polarised membrane growth through its interaction with Rho1p, a small GTP-binding protein.
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Description: This family includes biotin protein ligase, lipoate-protein ligase A and B. Biotin is covalently attached at the active site of certain enzymes that transfer carbon dioxide from bicarbonate to organic acids to form cellular metabolites. Biotin protein ligase (BPL) is the enzyme responsible for attaching biotin to a specific lysine at the active site of biotin enzymes. Each organism probably has only one BPL. Biotin attachment is a two step reaction that results in the formation of an amide linkage between the carboxyl group of biotin and the epsilon-amino group of the modified lysine [2]. Lipoate-protein ligase A (LPLA) catalyses the formation of an amide linkage between lipoic acid and a specific lysine residue in lipoate dependent enzymes [3]. The unusual biosynthesis pathway of lipoic acid is mechanistically intertwined with attachment of the cofactor [5].
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Description: This entry is of the conserved N-terminal 150 residues of proteins conserved from plants to humans. The function is unknown although some annotation suggests it to be a transmembrane protein.
Ontology Term
Description: This family consists of the PetM family of cytochrome b6f complex subunit IV. The cytochrome b6f complex consists of 7 subunits and contains 2 beta hemes and 1 chlorophyll alpha per cytochrome f. It is highly active in transferring electrons from decylplastoquinol to oxidised plastocyanin [1].
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Description: This is a family of membrane signal serine endopeptidases which function in the processing of newly-synthesised secreted proteins. Peptidase S26 removes the hydrophobic, N-terminal, signal peptides as proteins are translocated across membranes. The active site residues take the form of a catalytic dyad that is Ser, Lys in subfamily S26A; the Ser is the nucleophile in catalysis, and the Lys is the general base.
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Description: Structure is a multi-domain fold containing a bundle of helices and a beta sandwich.
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Description: This family consists of uroporphyrinogen-III synthase HemD EC:4.2.1.75 also known as Hydroxymethylbilane hydrolyase (cyclizing) from eukaryotes, bacteria and archaea. This enzyme catalyses the reaction: Hydroxymethylbilane <=> uroporphyrinogen-III + H(2)O. Some members of this family are multi-functional proteins possessing other enzyme activities related to porphyrin biosynthesis, such as Swiss:Q59294 with Pfam:PF00590, however the aligned region corresponds with the uroporphyrinogen-III synthase EC:4.2.1.75 activity only. Uroporphyrinogen-III synthase is the fourth enzyme in the heme pathway [2]. Mutant forms of the Uroporphyrinogen-III synthase gene cause congenital erythropoietic porphyria in humans a recessive inborn error of metabolism also known as Gunther disease [1].
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Description: NULL
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Description: This family contains polyketide cylcases/dehydrases which are enzymes involved in polyketide synthesis. The family also includes proteins which are involved in the binding/transport of lipids.
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Description: This entry carries part of the crucial 144 N-terminal residues of the FmiP (Fms interacting protein). A member of the THO (suppressors of the transcriptional defects of hpr1delta by overexpression) complex which is a subcomplex of the transcription/export (TREX) complex [1]. It is essential for the binding of the protein to the cytoplasmic domain of activated Fms-molecules in M-CSF induced haematopoietic differentiation of macrophages. Fmip is also known as THOC5 (THO complex subunit 5) a 683 amino acids long protein which contains a nuclear localisation sequence (NLS), a leucine zipper and a PEST like sequence (aa. 303-319) that carries three ataxia-telangiectasia mutated (ATM) kinase specific phosphorylation sites. The C-terminus contains a THOC1 binding site [2]. The level of FMIP/Thoc5 expression might form a threshold that determines whether cells differentiate into macrophages or into granulocytes [3].
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Description: NULL
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Description: The catalytic triad of this esterase enzyme comprises residues Ser127, His403 and Asp391 in UniProtKB:P70665 [1,2].
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Description: This family consists of three different eukaryotic proteins (mortality factor 4 (MORF4/MRG15), male-specific lethal 3(MSL-3) and ESA1-associated factor 3(EAF3)). It is thought that the MRG family is involved in transcriptional regulation via histone acetylation [1][2]. It contains 2 chromo domains and a leucine zipper motif [3].
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Description: NULL
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Description: Members of this family, which are found in the amino terminus of various SNARE proteins, adopt a structure consisting of an antiparallel three-helix bundle. Their exact function has not been determined, though it is known that they regulate the SNARE motif, as well as mediate various protein-protein interactions involved in membrane-transport [1].
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Description: AUG8 belongs to the plant QWRF motif-containing protein family, which also includes microtubule-associated protein ENDOSPERM DEFECTIVE 1 [1, 2] and SNOWY COTYLEDON 3 [3]. AUG8 binds the microtubule plus-end and participates in the reorientation of microtubules in hypocotyls (the stem of a germinating seedling) [4,5].
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Description: Family of proteins thought to be involved in regulating gene activity in the proliferative and/or differentiative pathways induced by NGF [1].
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Description: Interferon-related developmental regulator (IFRD1) is the human homologue of the rat early response protein PC4 and its murine homologue TIS7 [1]. The exact function of IFRD1 is unknown but it has been shown that PC4 is necessary to muscle differentiation and that it might have a role in signal transduction. This family also contains IFRD2 and its murine equivalent SKMc15 which are highly expressed soon after gastrulation and in the hepatic primordium, suggesting an involvement in early hematopoiesis [2].
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Description: This C terminal domain is found in the Dbp10p subfamily of hypothetical RNA helicases [1].
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Description: Members of this family are asparaginyl peptidases [1]. The blood fluke parasite Schistosoma mansoni has at least five Clan CA cysteine peptidases in its digestive tract including cathepsins B (2 isoforms), C, F and L. All have been recombinantly expressed as active enzymes, albeit in various stages of activation [2]. In addition, a Clan CD peptidase, termed asparaginyl endopeptidase or 'legumain' has been identified. This has formerly been characterised as a 'haemoglobinase', but this term is probably incorrect [2]. Two cDNAs have been described for Schistosoma mansoni legumain; one encodes an active enzyme whereas the active site cysteine residue encoded by the second cDNA is substituted by an asparagine residue. Both forms have been recombinantly expressed [3].
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Description: NULL
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Description: NULL
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Description: This family contains polyketide cylcases/dehydrases which are enzymes involved in polyketide synthesis. It also includes other proteins of the START superfamily [1].
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Description: This family consists of several ceramidases. Ceramidases are enzymes involved in regulating cellular levels of ceramides, sphingoid bases, and their phosphates, EC:3.5.1.23. This family belongs to the CREST superfamily [2], which are distantly related to the GPCRs.
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Description: Members of this family are aminopeptidases. The members differ widely in specificity, hydrolysing acidic, basic or neutral N-terminal residues. This family includes leukotriene-A4 hydrolase Swiss:P09960, this enzyme also has an aminopeptidase activity [1].
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Description: This family consist of Cyclopropane-fatty-acyl-phospholipid synthase or CFA synthase EC:2.1.1.79 this enzyme catalyse the reaction: S-adenosyl-L-methionine + phospholipid olefinic fatty acid <=> S-adenosyl-L-homocysteine + phospholipid cyclopropane fatty acid.
Ontology Term
Description: This family includes subunit CCB3 of cofactor assembly complex C, involved in c-type cytochrome maturation in photosynthetic organisms [1]. This family also includes uncharacterised protein YggT, associated with bacteria outside the cyanobacteria.
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Description: This domain is highly charged and may represent a small helical extension of the Smr domain (Pfam:PF01713), known as N-ext, whose function is not yet clear [1].
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Description: NULL
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