Ribosomal protein L31e, which is present in archaea and eukaryotes, binds the 23S rRNA and is one of six protein components encircling the polypeptide exit tunnel. It is a component of the eukaryotic 60S (large) ribosomal subunit, and the archaeal 50S (large) ribosomal subunit. Length = 83
>gnl|CDD|140220 PTZ00193, PTZ00193, 60S ribosomal protein L31; Provisional
>PF01198 Ribosomal_L31e: Ribosomal protein L31e; InterPro: IPR000054 Ribosomes are the particles that catalyse mRNA-directed protein synthesis in all organisms
The codons of the mRNA are exposed on the ribosome to allow tRNA binding. This leads to the incorporation of amino acids into the growing polypeptide chain in accordance with the genetic information. Incoming amino acid monomers enter the ribosomal A site in the form of aminoacyl-tRNAs complexed with elongation factor Tu (EF-Tu) and GTP. The growing polypeptide chain, situated in the P site as peptidyl-tRNA, is then transferred to aminoacyl-tRNA and the new peptidyl-tRNA, extended by one residue, is translocated to the P site with the aid the elongation factor G (EF-G) and GTP as the deacylated tRNA is released from the ribosome through one or more exit sites [, ]. About 2/3 of the mass of the ribosome consists of RNA and 1/3 of protein. The proteins are named in accordance with the subunit of the ribosome which they belong to - the small (S1 to S31) and the large (L1 to L44). Usually they decorate the rRNA cores of the subunits. Many ribosomal proteins, particularly those of the large subunit, are composed of a globular, surfaced-exposed domain with long finger-like projections that extend into the rRNA core to stabilise its structure. Most of the proteins interact with multiple RNA elements, often from different domains. In the large subunit, about 1/3 of the 23S rRNA nucleotides are at least in van der Waal's contact with protein, and L22 interacts with all six domains of the 23S rRNA. Proteins S4 and S7, which initiate assembly of the 16S rRNA, are located at junctions of five and four RNA helices, respectively. In this way proteins serve to organise and stabilise the rRNA tertiary structure. While the crucial activities of decoding and peptide transfer are RNA based, proteins play an active role in functions that may have evolved to streamline the process of protein synthesis. In addition to their function in the ribosome, many ribosomal proteins have some function 'outside' the ribosome [, ]. A number of eukaryotic and archaebacterial large subunit ribosomal proteins can be grouped on the basis of sequence similarities. These proteins have 87 to 128 amino-acid residues. This family consists of: Yeast L34 Archaeal L31 [] Plants L31 Mammalian L31 [] ; GO: 0003735 structural constituent of ribosome, 0006412 translation, 0005622 intracellular, 0005840 ribosome; PDB: 3G6E_X 3I56_X 1YIT_X 1NJI_Y 3CC4_X 1VQM_X 1KC8_Y 1VQ9_X 1VQN_X 1M1K_Y ....
Promiscuous Behavior Of Proteins In Archaeal Riboso
2e-04
>pdb|2GO5|6 Chain 6, Structure Of Signal Recognition Particle Receptor (Sr) In Complex With Signal Recognition Particle (Srp) And Ribosome Nascent Chain Complex Length = 123
>pdb|3IZR|GG Chain g, Localization Of The Large Subunit Ribosomal Proteins Into A 5.5 A Cryo-Em Map Of Triticum Aestivum Translating 80s Ribosome Length = 123
>pdb|2ZKR|XX Chain x, Structure Of A Mammalian Ribosomal 60s Subunit Within An 80s Complex Obtained By Docking Homology Models Of The Rna And Proteins Into An 8.7 A Cryo-Em Map Length = 125
>pdb|1S1I|W Chain W, Structure Of The Ribosomal 80s-Eef2-Sordarin Complex From Yeast Obtained By Docking Atomic Models For Rna And Protein Components Into A 11.7 A Cryo-Em Map. This File, 1s1i, Contains 60s Subunit. The 40s Ribosomal Subunit Is In File 1s1h Length = 112
>pdb|3JYW|W Chain W, Structure Of The 60s Proteins For Eukaryotic Ribosome Based On Cryo-Em Map Of Thermomyces Lanuginosus Ribosome At 8.9a Resolution Length = 79
>pdb|3J21|AA Chain a, Promiscuous Behavior Of Proteins In Archaeal Ribosomes Revealed By Cryo-em: Implications For Evolution Of Eukaryotic Ribosomes (50s Ribosomal Proteins) Length = 95