EOG8RJJH9 GO:0016021 24/88 integral component of membrane cellular_component "The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane." [GOC:dos, GOC:go_curators] EOG8RJJH9 GO:0005789 21/88 endoplasmic reticulum membrane cellular_component "The lipid bilayer surrounding the endoplasmic reticulum." [GOC:mah] EOG8RJJH9 GO:0005783 3/88 endoplasmic reticulum cellular_component "The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached)." [ISBN:0198506732] EOG8RJJH9 GO:0005786 1/88 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] EOG8RJJH9 GO:0005875 1/88 microtubule associated complex cellular_component "Any multimeric complex connected to a microtubule." [GOC:jl] EOG8RJJH9 GO:0005048 1/88 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] EOG8RJJH9 GO:0005811 1/88 lipid particle cellular_component "An intracellular non-membrane-bounded organelle comprising a matrix of coalesced lipids surrounded by a phospholipid monolayer. May include associated proteins." [GOC:mah, GOC:tb] EOG8RJJH9 GO:0006621 1/88 protein retention in ER lumen biological_process "The retention in the endoplasmic reticulum (ER) lumen of soluble resident proteins. Sorting receptors retrieve proteins with ER localization signals, such as KDEL and HDEL sequences or some transmembrane domains, that have escaped to the cis-Golgi network and return them to the ER. Abnormally folded proteins and unassembled subunits are also selectively retained in the ER." [ISBN:0716731363, PMID:12972550]