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Search results 5001 to 5100 out of 202262 for *

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Categories

Category: OntologyTerm
Type Details Score
Ontology Term  
Ontology Term
Description: This domain is found either on its own or in association with the tRNA synthetase class II core domain (Pfam:PF00587). It is involved in the tRNA editing of mis-charged tRNAs including Cys-tRNA(Pro), Cys-tRNA(Cys), Ala-tRNA(Pro)[2-5]. The structure of this domain shows a novel fold [1].
Ontology Term
Description: N-terminal and C-terminal domains of PCNA are topologically identical. Three PCNA molecules are tightly associated to form a closed ring encircling duplex DNA.
Ontology Term  
Ontology Term
Description: CRCB is a family of bacterial integral membrane proteins with four TMs.. Over expression in E. coli also leads to camphor resistance [1,2].
Ontology Term
Description: This is a family of short ubiquitin-like proteins, that is like neither type-1 or type-2. It is a ubiquitin-fold modifier 1 (Ufm1) that is synthesised in a precursor form of 85 amino-acid residues. In humans the enzyme for Ufm1 is Uba5 and the conjugating enzyme is Ufc1. Prior to activation by Uba5 the extra two amino acids at the C-terminal region of the human pro-Ufm1 protein are removed to expose Gly whose residue is necessary for conjugation to target molecule(s). The mature Ufm1 is conjugated to yet unidentified endogenous proteins,[1]. While Ubiquitin and many Ubls possess the conserved C-terminal di-glycine that is adenylated by each specific E1 or E1-like enzyme, respectively, in an ATP-dependent manner, Ufm1(1-83) possesses a single glycine at its C-terminus, which is followed by a Ser-Cys dipeptide in the precursor form of Ufm1. The C-terminally processed Ufm1(1-83) is specifically activated by Uba5, an E1-like enzyme, and then transferred to its cognate Ufc1, an E2-like enzyme [2].
Ontology Term  
Ontology Term  
Ontology Term
Description: The function of this structural domain is unknown. It is found to the C terminus of the biotin protein ligase catalytic domain Pfam:PF01317.
Ontology Term  
Ontology Term
Description: This domain acts as a GDP-GTP exchange factor (GEF). It activates Rab GTPases by stimulating the release of GDP and allowing GTP to bind [1].
Ontology Term  
Ontology Term
Description: This family of proteins is functionally uncharacterised.
Ontology Term
Description: This family represents the C-terminus (approximately 500 residues) of the eukaryotic coatomer alpha subunit. Coatomer (COPI) is a large cytosolic protein complex which forms a coat around vesicles budding from the Golgi apparatus. Such coatomer-coated vesicles have been proposed to play a role in many distinct steps of intracellular transport [1]. Note that many family members also contain the Pfam:PF04053 domain.
Ontology Term  
Ontology Term
Description: This family represents a conserved region of approximately 60 residues within a number of hypothetical bacterial and archaeal proteins of unknown function.
Ontology Term  
Ontology Term
Description: The DNA/pantothenate metabolism flavoprotein (EC:4.1.1.36) affects synthesis of DNA, and pantothenate metabolism.
Ontology Term  
Ontology Term  
Ontology Term
Description: NULL
Ontology Term  
Ontology Term  
Ontology Term
Description: This family contains proteins that are involved in nonsense mediated mRNA decay. A process that is triggered by premature stop codons in mRNA. The family includes Smg-4 [1] and UPF3.
Ontology Term  
Ontology Term  
Ontology Term
Description: This family consists of various deoxynucleoside kinases cytidine EC:2.7.1.74, guanosine EC:2.7.1.113, adenosine EC:2.7.1.76 and thymidine kinase EC:2.7.1.21 (which also phosphorylates deoxyuridine and deoxycytosine.) These enzymes catalyse the production of deoxynucleotide 5'-monophosphate from a deoxynucleoside. Using ATP and yielding ADP in the process.
Ontology Term  
Ontology Term
Description: NULL
Ontology Term  
Ontology Term
Description: This family of short eukaryotic proteins has no known function. Most of the members of this family are only 80 amino acid residues long. However the Arabidopsis homologue is over 300 residues long. The presumed domain contains a conserved amino terminal cysteine and a conserved motif GXGXGXG in the carboxy terminal half that may be functionally important.
Ontology Term  
Ontology Term  
Ontology Term
Description: This family includes the 5,10-methylenetetrahydrofolate reductase EC:1.7.99.5 from bacteria and methylenetetrahydrofolate reductase EC: 1.5.1.20 from eukaryotes. The structure for this domain is known [1] to be a TIM barrel.
Ontology Term  
Ontology Term
Description: NULL
Ontology Term  
Ontology Term
Description: The con80 domain of katanin is the C-terminal region of the protein that binds to the N-terminal domain of katanin-p60, the catalytic ATPase. The complex associates with a specific subregion of the mitotic spindle leading to increased microtubule disassembly and targeting of p60 to the spindle poles [1]. The assembly and function of the mitotic spindle requires the activity of a number of microtubule-binding proteins. Katanin, a heterodimeric microtubule-severing ATPase, is found localized at mitotic spindle poles. A proposed model is that katanin is targeted to spindle poles through a combination of direct microtubule binding by the p60 subunit and through interactions between the WD40 domain and an unknown protein [2].
Ontology Term  
Ontology Term  
Ontology Term
Description: This family includes the following members. Glycinamide ribonucleotide transformylase catalyses the third step in de novo purine biosynthesis, the transfer of a formyl group to 5'-phosphoribosylglycinamide. Formyltetrahydrofolate deformylase produces formate from formyl- tetrahydrofolate. Methionyl-tRNA formyltransferase transfers a formyl group onto the amino terminus of the acyl moiety of the methionyl aminoacyl-tRNA. Inclusion of the following members is supported by PSI-blast. HOXX_BRAJA (P31907) contains a related domain of unknown function. PRTH_PORGI (P46071) contains a related domain of unknown function. Y09P_MYCTU (Q50721) contains a related domain of unknown function.
Ontology Term  
Ontology Term  
Ontology Term
Description: This family includes the N terminus of eIF-5 Swiss:P55010, and the C terminus of eIF-2 beta Swiss:P20042. This region corresponds to the whole of the archaebacterial eIF-2 beta homologue. The region contains a putative zinc binding C4 finger.
Ontology Term  
Ontology Term  
Ontology Term  
Ontology Term
Description: Members of this family are involved in modifying bases in RNA molecules. They carry out the conversion of uracil bases to pseudouridine. This family includes TruB, a pseudouridylate synthase that specifically converts uracil 55 to pseudouridine in most tRNAs. This family also includes Cbf5p that modifies rRNA [2].
Ontology Term  
Ontology Term  
Ontology Term
Description: This family consists of bacterial domains with an Ig-like fold. Members of this family are found in bacterial and phage surface proteins such as intimins.
Ontology Term  
Ontology Term
Description: GPI (glycosyl phosphatidyl inositol) transamidase is a multi-protein complex. Gpi16, Gpi8 and Gaa1 for a sub-complex of the GPI transamidase. GPI transamidase that adds glycosylphosphatidylinositols (GPIs) to newly synthesised proteins.
Ontology Term  
Ontology Term
Description: This domain represents a conserved region that has a UBA like fold. It is found in a number of plant proteins of unknown function.
Ontology Term  
Ontology Term
Description: This domain of unknown function is found in Focadhesin from animals and RST1 (RESURRECTION 1) from plants. Focadhesin (FOCAD) is a focal adhesion protein with potential tumour suppressor function in gliomas [1]. RST1 was originally identified in a genetic screen for factors involved in the biosynthesis of epicuticular waxes [2]. Later, RST1 and RST1 INTERACTING PROTEIN (RIPR) have been shown to act as cofactors of the cytoplasmic exosome and the Ski complex in plants [3]. It is involved in the suppression of siRNA-mediated silencing of transgenes and certain endogenous transcripts [4]. Structure predictions suggest that this is an alpha-helical domain with and armadillo-like fold.
Ontology Term  
Ontology Term  
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Ontology Term
Description: This protein contains a P-loop.
Ontology Term
Description: This family consists of several pre-mRNA cleavage complex II Clp1 (or HeaB) proteins. Six different protein factors are required in vitro for 3' end formation of mammalian pre-mRNAs by endonucleolytic cleavage and polyadenylation. Clp1 is a subunit of cleavage complex IIA, which is required for cleavage, but not for polyadenylation of pre-mRNA [1].
Ontology Term
Description: The function of CbiX is uncertain, however it is found in cobalamin biosynthesis operons and so may have a related function. Some CbiX proteins contain a striking histidine-rich region at their C-terminus, which suggests that it might be involved in metal chelation [1].
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Ontology Term
Description: The enzyme 3 beta-hydroxysteroid dehydrogenase/5-ene-4-ene isomerase (3 beta-HSD) catalyses the oxidation and isomerisation of 5-ene-3 beta-hydroxypregnene and 5-ene-hydroxyandrostene steroid precursors into the corresponding 4-ene-ketosteroids necessary for the formation of all classes of steroid hormones.
Ontology Term  
Ontology Term  
Ontology Term
Description: NULL
Ontology Term  
Ontology Term
Description: NULL
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Ontology Term
Description: NULL
Ontology Term
Description: This Mediator complex subunit was formerly known as Srb4 in yeasts or Trap80 in Drosophila and human. The Med17 subunit is located within the head domain and is essential for cell viability to the extent that a mutant strain of cerevisiae lacking it shows all RNA polymerase II-dependent transcription ceasing at non-permissive temperatures.
Ontology Term  
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Ontology Term
Description: This domain is found in the protein Piwi and its relatives. The function of this domain is the dsRNA guided hydrolysis of ssRNA. Determination of the crystal structure of Argonaute reveals that PIWI is an RNase H domain, and identifies Argonaute as Slicer, the enzyme that cleaves mRNA in the RNAi RISC complex [2]. In addition, Mg+2 dependence and production of 3'-OH and 5' phosphate products are shared characteristics of RNaseH and RISC. The PIWI domain core has a tertiary structure belonging to the RNase H family of enzymes. RNase H fold proteins all have a five-stranded mixed beta-sheet surrounded by helices. By analogy to RNase H enzymes which cleave single-stranded RNA guided by the DNA strand in an RNA/DNA hybrid, the PIWI domain can be inferred to cleave single-stranded RNA, for example mRNA, guided by double stranded siRNA.
Ontology Term
Description: ArgoL1 is a region found in argonaute [1] proteins. It normally co-occurs with Pfam:PF02179 and Pfam:PF02171. It is a linker region between the N-terminal and the PAZ domains. It contains an alpha-helix packed against a three-stranded antiparallel beta-sheet with two long beta-strands (beta8 and beta9) of the sheet spanning one face of the adjacent N and PAZ domains. L1 together with linker 2, L2, PAZ and ArgoN forms a compact global fold [2].
Ontology Term  
Ontology Term
Description: Members of this family have several predicted transmembrane helices. One member of the family has been characterised as protein PGR (AtPGR). PGR is suggested to be a potential glucose-responsive regulator in carbohydrate metabolism in plants. This entry also includes protein VTE6, which is a Pphytyl-phosphate kinase catalysing the conversion of phytyl-monophosphate to phytyl-diphosphate [1].
Ontology Term
Description: This domain family is found in bacteria and eukaryotes, and is typically between 120 and 131 amino acids in length. The family is found in association with Pfam:PF01643. The plant acyl-acyl carrier protein (ACP) thioesterases (TEs) have roles in fatty acid synthesis.
Ontology Term  
Ontology Term  
Ontology Term
Description: The methionine-10 mutant allele of N. crassa codes for a protein of unknown function, Swiss:O27901. However, homologous proteins have been found in yeast (Swiss:P38793) suggesting this protein may be involved in methionine biosynthesis, transport and/or utilisation [1].
Ontology Term
Description: This is a family of conserved transmembrane proteins that appear in humans to be expressed from a region upstream of the FragileXF site and to be intimately linked with the Fragile-X syndrome. Absence of TMEM185A does not necessarily lead to developmental delay, but might in combination with other, yet unknown, factors. Otherwise, the lack of the TMEM185A protein is either disposable (redundant) or its function can be complemented by the highly similar chromosome 2 retro-pseudogene product, TMEM185B [1].
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Description: The general transcription factor TFIIE has an essential role in eukaryotic transcription initiation together with RNA polymerase II and other general factors. Human TFIIE consists of two subunits TFIIE-alpha Swiss:P29083 and TFIIE-beta Swiss:P29084 and joins the pre-initiation complex after RNA polymerase II and TFIIF [1]. This family consists of the conserved amino terminal region of eukaryotic TFIIE-alpha [2] and proteins from archaebacteria that are presumed to be TFIIE-alpha subunits also Swiss:O29501 [3].
Ontology Term
Description: Members of this family are prephenate dehydrogenases (PDHs) EC:1.3.1.12 involved in tyrosine biosynthesis. This is the N-terminal nucleotide-binding domain of PDHs, which has a modified Rossmann nucleotide-binding fold with an extended beta-sheet sandwiched by three helices on each face [1].
Ontology Term  
Ontology Term  
Ontology Term
Description: This family includes single stranded binding proteins and also the primosomal replication protein N (PriB). PriB forms a complex with PriA, PriC and ssDNA.
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Ontology Term
Description: This family is found at the N-terminus of several eukaryotic RNA processing proteins (e.g Swiss:Q8N3B7).
Ontology Term  
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