The Protein synthesis is the process in which cells build proteins. Term is sometimes used to refer only to protein translation but more often it refers to a multi step process, beginning with amino acid synthesis and transcription of nuclear DNA into messenger RNA, which is then used as input to translation.
Cistron DNA is transcribed into a variety of RNA intermediates. Last version is used as a template in synthesis of a polypeptide chain. Proteins can often be synthesized directly from genes by translating mRNA. When a protein needs to be available on short notice or in large quantities, a protein precursor is produced. Proportion is an inactive protein containing one or more inhibitory peptides that can be activated when the inhibitory sequence is removed by proteolysis during posttranslational modification.
A proportion is a form that contains a signal sequence that specifies its insertion into or through membranes. Signal peptide is cleaved off in the endoplasmic reticulum. Preproproteins have both sequences still present. Synthesis of protein, a succession of tRNA molecules charged with appropriate amino acids have to be brought together with an mRNA molecule and matched up by base pairing through their anti cordons with each of its successive cordons. Amino acids then have to be linked together to extend the growing protein chain, tRNAs, relieved of their burdens, have to be released. Whole complex of processes is carried out by a giant multi molecular machine, Ribosome, formed of two main chains of RNA, called ribosomal RNA (rRNA), and more than 50 different proteins. This molecular juggernaut latches onto the end of an mRNA molecule and then trundles along it, capturing loaded tRNA molecules and stitching together the amino acids they carry to form a new protein chain. Protein biosynthesis, although very similar, is different for prokaryotes and eukaryotes
Cistron DNA is transcribed into a variety of RNA intermediates. Last version is used as a template in synthesis of a polypeptide chain. Proteins can often be synthesized directly from genes by translating mRNA. When a protein needs to be available on short notice or in large quantities, a protein precursor is produced. Proportion is an inactive protein containing one or more inhibitory peptides that can be activated when the inhibitory sequence is removed by proteolysis during posttranslational modification.
A proportion is a form that contains a signal sequence that specifies its insertion into or through membranes. Signal peptide is cleaved off in the endoplasmic reticulum. Preproproteins have both sequences still present. Synthesis of protein, a succession of tRNA molecules charged with appropriate amino acids have to be brought together with an mRNA molecule and matched up by base pairing through their anti cordons with each of its successive cordons. Amino acids then have to be linked together to extend the growing protein chain, tRNAs, relieved of their burdens, have to be released. Whole complex of processes is carried out by a giant multi molecular machine, Ribosome, formed of two main chains of RNA, called ribosomal RNA (rRNA), and more than 50 different proteins. This molecular juggernaut latches onto the end of an mRNA molecule and then trundles along it, capturing loaded tRNA molecules and stitching together the amino acids they carry to form a new protein chain. Protein biosynthesis, although very similar, is different for prokaryotes and eukaryotes
No comments:
Post a Comment