EOG8QZB17 GO:0005525 26/92 GTP binding molecular_function "Interacting selectively and non-covalently with GTP, guanosine triphosphate." [GOC:ai] EOG8QZB17 GO:0008312 25/92 7S RNA binding molecular_function "Interacting selectively and non-covalently with 7S RNA, the RNA component of the signal recognition particle (SRP)." [GOC:jl, PMID:6181418] EOG8QZB17 GO:0006614 25/92 SRP-dependent cotranslational protein targeting to membrane biological_process "The targeting of proteins to a membrane that occurs during translation and is dependent upon two key components, the signal-recognition particle (SRP) and the SRP receptor. SRP is a cytosolic particle that transiently binds to the endoplasmic reticulum (ER) signal sequence in a nascent protein, to the large ribosomal unit, and to the SRP receptor in the ER membrane." [ISBN:0716731363] EOG8QZB17 GO:0048500 24/92 signal recognition particle cellular_component "A complex of protein and RNA which facilitates translocation of proteins across membranes." [GOC:mlg] EOG8QZB17 GO:0003924 24/92 GTPase activity molecular_function "Catalysis of the reaction: GTP + H2O = GDP + phosphate." [ISBN:0198547684] EOG8QZB17 GO:0016779 1/92 nucleotidyltransferase activity molecular_function "Catalysis of the transfer of a nucleotidyl group to a reactant." [ISBN:0198506732] EOG8QZB17 GO:0006617 1/92 SRP-dependent cotranslational protein targeting to membrane, signal sequence recognition biological_process "The process in which SRP binds to the signal peptide in a nascent protein, causing protein elongation to pause, during cotranslational membrane targeting." [ISBN:0815316194] EOG8QZB17 GO:0005048 1/92 signal sequence binding molecular_function "Interacting selectively and non-covalently with a signal sequence, a specific peptide sequence found on protein precursors or mature proteins that dictates where the mature protein is localized." [GOC:ai] EOG8QZB17 GO:0006396 1/92 RNA processing biological_process "Any process involved in the conversion of one or more primary RNA transcripts into one or more mature RNA molecules." [GOC:mah] EOG8QZB17 GO:0006729 1/92 tetrahydrobiopterin biosynthetic process biological_process "The chemical reactions and pathways resulting in the formation of tetrahydrobiopterin, the reduced form of biopterin (2-amino-4-hydroxy-6-(1,2-dihydroxypropyl)-pteridine). It functions as a hydroxylation coenzyme, e.g. in the conversion of phenylalanine to tyrosine." [CHEBI:15372, GOC:go_curators, ISBN:0198506732] EOG8QZB17 GO:0005786 1/92 signal recognition particle, endoplasmic reticulum targeting cellular_component "A ribonucleoprotein particle of 325 kDa composed of a 7S (300 nucleotide) RNA molecule and a complex of six different polypeptides. This binds both to the N-terminal signal peptide for proteins destined for the endoplasmic reticulum as they emerge from the large ribosomal subunit and also to the ribosome. This binding arrests further translation thereby preventing the proteins from being released into the cytosol. The SRP-ribosome complex then diffuses to the endoplasmic reticulum where it is bound to the signal recognition particle receptor, which allows resumption of protein synthesis and facilitates the passage of the growing polypeptide chain through the translocon. Through a process involving GTP hydrolysis, the SRP-SRP receptor complex dissociates and SRP returns to the cytosol. Of the six polypeptides of SRP the 54 kDa subunit (SRP54) is the central player. It contains an N-terminal GTPase domain and a C-terminal domain that binds directly to the signal peptide and the SRP RNA. Examples of this component are found in Mus musculus, Saccharomyces cerevisiae and Arabidopsis thaliana." [GOC:mtg_sensu, ISBN:0198506732] EOG8QZB17 GO:0008124 1/92 4-alpha-hydroxytetrahydrobiopterin dehydratase activity molecular_function "Catalysis of the reaction: (6R)-6-(L-erythro-1,2-dihydroxypropyl)-5,6,7,8-tetrahydro-4a-hydroxypterin = (6R)-6-(L-erythro-1,2-dihydroxypropyl)-7,8-dihydro-6H-pterin + H(2)O." [EC:4.2.1.96, RHEA:11923]