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Topic: Polypeptide synthesis

	1306 Protein Synthesis
		This frees the polypeptide and the translation complex disassembles.
		During and after synthesis, a polypeptide coils and folds to its three-dimensional shape spontaneously.
		A signal recognition particle (SRP) binds to the signal peptide and attaches it and its ribosome to a receptor protein in the ER membrane.
	www3.baylor.edu /~Mark_Taylor/1306proteinsynthesis.htm (2814 words)

	History Channel Search Results
		The synthesis of polypeptides in a cell is carried out in accordance with specifications encoded in the cell’s genetic material, deoxyribonucleic acid, or
		In DNA segments that provide the genetic codes for polypeptides, a particular amino acid is specified by a codon, or triplet, which is a group of three nucleotides.
		The first step in polypeptide synthesis is a process known as transcription, in which the code for the polypeptide is copied from DNA to a type of RNA molecule called messenger RNA (mRNA), which is assembled, with the help of
	www.historychannel.com /encyclopedia/article.jsp?link=FWNE.fw..ri044050.a (543 words)

	BIOL2060: Translation (Site not responding. Last check: 2007-10-26)
		Synthesis of all polypeptides encoded by nuclear genes begins in the cytosol.
		When the polypeptide is complete, it is released from the ribosome and either remains in the cytosol or is transported into the appropriate organelle by posttranslational import.
		Polypeptides synthesized on cytosolic ribosomes but destined for either the intermembrane space or the inner membrane of the mitochondrion require two separate targeting sequences (both located at the N-terminus).
	www.mun.ca /biology/desmid/brian/BIOL2060/CellBiol20/CB20b.html (1307 words)

	[No title]
		Polypeptide synthesis requires three different classes of RNA, all of which are encoded in the DNA.
		Protein synthesis occurs on ribosomes in the cytoplasm.
		The enzyme that catalyzes RNA synthesis as a complement to a DNA strand is RNA polymerase.
	www.nvo.com /jin/customhtml1 (3557 words)

	Protein biosynthesis - Wikipedia, the free encyclopedia
		Protein biosynthesis (Synthesis) is the process in which cells build proteins.
		During and after synthesis, polypeptide chains often fold to assume, so called, native secondary and tertiary structures.
		Enzymes may also remove one or more amino acids from the leading (amino) end of the polypeptide chain, leaving a protein consisting of two polypeptide chains connected by disulfide bonds.
	en.wikipedia.org /wiki/Protein_biosynthesis (669 words)

	Protein Structure Organization Laboratory, Branch of Institution of Bioorganic Chemistry RAS (Site not responding. Last check: 2007-10-26)
		The main fields are the study of the polypeptide folding during its synthesis on the ribosome and renaturation upon gene expression in various systems and development of polypeptide synthesis in a cell-free system.
		endogenous proteases in cell lysate primarily cleave the polypeptide chain at the spacer between the functional parts of the chymeric protein and at the regions devoid of rigid structure, which depends on the amino acid sequence (impossibility of folding).
		However, N-terminal sequencing of the chymeric protein Sarc-Ob demonstrated that the polypeptide chain was heterogeneous and shortened by 4 and 5 aa as a result of cleavage at the lysine residues.
	www.fibkh.serpukhov.su /English/divisions/protein_str.html (2509 words)

	RNA Synthesis
		Transcription is the mechanism by which a template strand of DNA is utilized by specific RNA polymerases to generate one of the three different classifications of RNA.
		The proteins of the ribosomes catalyze all of the functions of polypeptide synthesis.
		Synthesis of RNA exhibits several features that are synonymous with DNA replication.
	www.indstate.edu /thcme/mwking/rna.html (2011 words)

	CRORA : RESUME DES PUBLICATIONS (Site not responding. Last check: 2007-10-26)
		Inhibition of polypeptide synthesis was 20-fold greater than that of RNA synthesis which presumably reflected the amplification resulting from cumulative translation of mRNAs.
		Dilution of DI virus restored the inhibition of host protein synthesis but further dilution was necessary before virus-specified polypeptide synthesis could be demonstrated.
		It was concluded that DI SFV preparations have qualitatively different interfering activities in relation to their effects on virus and host cell polypeptide synthesis.
	www.pasteur.fr /recherche/banques/CRORA/res12/re6980.htm (162 words)

	Cotranslational Protein Folding -- Fedorov and Baldwin 272 (52): 32715 -- Journal of Biological Chemistry
		wider) as the length of the polypeptide increases, and as the
		the polypeptide from the ribosome, presumably by interference
		polypeptides in the presence of chaperones and folding catalysts.
	www.jbc.org /cgi/content/full/272/52/32715 (4499 words)

	Translating Ribosomes Inhibit Poliovirus Negative-Strand RNA Synthesis -- Barton et al. 73 (12): 10104 -- The Journal ...
		In the infected cell, protein synthesis and RNA replication are codependent since protein synthesis requires RNA replication and vice versa.
		In this case, amplification of the input RNA is not required to achieve maximum rates of protein synthesis and RNA replication in vitro, which leads to a linear replication pathway.
		Diphtheria toxin-dependent adenosine diphosphate ribosylation of aminoacyl transferase II and the inhibition of protein synthesis.
	jvi.asm.org /cgi/content/full/73/12/10104 (6500 words)

	[No title] (Site not responding. Last check: 2007-10-26)
		In some types of cells, this mRNA molecule is processed in various ways before moving to the cytoplasm where it acts as the template for the synthesis of a polypeptide chain.
		These were then placed in tubes of cell extract and allowed to direct the synthesis of polypeptide chains.
		From the type and nature of the polypeptides that were made this way, it was possible to work out which codons of bases coded for which sequences of amino acids.
	www.brooklyn.cuny.edu /bc/ahp/BioWeb/Lab2/Lab2.Q1P1.html (309 words)

	Transcription and Translation (Site not responding. Last check: 2007-10-26)
		Polypeptide and mRNA are then released freeing the ribosome to attach to additional mRNAs.
		A small subgroup of codonss instead specify the termination of the translation of a given polypeptide.
		Such codons are called stop codons (because they stop a polypeptide's synthesis) or nonsense codons (which contrasts with the sense nature of codons which specify amino acids.
	www.mansfield.ohio-state.edu /~sabedon/biol1065.htm (2014 words)

	e-Learning Session
		DNA is restricted to nucleus; protein synthesis occurs in cytoplasm.
		Ribosomes are first free in cystol; once synthesis begins, some have series of amino acids called signal sequence that enables ribosome to bind to endoplasmic reticulum.
		The polypeptide is transferred and attached by a peptide bond to the newly arrived amino acid.
	www.mhhe.com /biosci/genbio/maderbiology7/student/olc/chap15-outline.mhtml (1690 words)

	Ribosomes & Peptide Bond Formation
		Polypeptide Elongation Cycles is an animation of polypeptide chain elongation.
		For example, much less is known about eukaryotic protein synthesis simply because it is not yet possible to take the "machine" apart and put it back together again.
		Thus, as we saw for RNA synthesis, initiation of the polymerization is the most important control step.
	www.nitorig.net /lec22.html (1300 words)

	Nucleic Acid Structure: (Site not responding. Last check: 2007-10-26)
		Synthesis is continuous on one strand and discontinuous on the other.
		DNA base sequence corresponds to the amino acid sequence of the polypeptide specified by the gene.
		Elongation of the polypeptide occurs as new tRNA's are brought in and old tRNA's are expelled from the ribosome following peptide bond synthesis.
	www.uta.edu /biology/badon/classnotes/3444/Lecture_16.htm (1782 words)

	Gene to protein
		DNA dictates the synthesis of proteins, which are the links between genotype and phenotype.
		During and after synthesis, a polypeptide coils and folds to its three-dimensional shape spontaneously.
		Other kinds of signal peptides are used to target polypeptides to mitochondria, chloroplasts, the nucleus, and other organelles that are not part of the endomembrane system.
	www.zo.utexas.edu /faculty/sjasper/bio212/proteins.html (2166 words)

	Automated polypeptide synthesis process (US4816513)
		An apparatus is provided for automatically constructing a polypeptide of high purity, up to 50 amino acids in length, using only single couplings.
		Also included is a reaction vessel for containing a resin used in solid-phase peptide synthesis for attaching a peptide chain thereto.
		A transfer system is also provided, which operates under control of a computer, to transfer the activated species from the activation system to the reaction vessel and to transfer amino acids, reagents, gases, and solvents from one part of the apparatus to another.
	www.delphion.com /details?pn10=US04816513 (706 words)

	[No title]
		AUG The usual initiation codon for polypeptide synthesis as well as the internal codon for methionine.
		In prokaryotes it codes for formyl-methionine when used as a START codon cap A complex structure containing the G base at the 5' termini of most eukaryotic mRNA molecules, having a 5'-5' linkage instead of the usual 3'-5' linkage.
		chain termination Process of ending polypeptide synthesis and releasing the polypeptide from the ribosome; a chain-termination mutation creates a new stop codon, resulting in premature termination of synthesis of the polypeptide chain.
	www.rpi.edu /locker/53/001053/KEY8.DAT (1234 words)

	HSC Online
		Polypeptide synthesis involves a type of nucleic acid, called RNA (ribonucleic acid).
		RNA is the intermediary between DNA and polypeptide synthesis.
		Any change in the base sequence in DNA results in changes to the polypeptides that are produced and is a source of new alleles.
	hsc.csu.edu.au /biology/core/blueprint/9_3_2/BIO934NET.htm (2186 words)

	Are synthesis and folding of proteins overlapping functions of the ribosomal RNA?
		This was not surprising, considering that the large subunit mainly constitutes the workshop for polypeptide synthesis – the formation of peptide bond and growth of the polypeptide chain.
		The protein synthesis inhibitory antibiotics which are known to bind to the large loop of domain V could also inhibit protein folding.
		This activity of ribosome had not been investigated so far, although it is coupled with protein synthesis in as much as the peptdiyl transferase activity overlapped with it and both the processes are sensitive to the same set of antibiotics.
	www.ias.ac.in /currsci/aug25/articles27.htm (3216 words)

	Translation
		Translation is the process of converting the sequence of nucleotide residues in mRNA into the sequence of amino acid residues in a polypeptide.
		Thus the polarity of polypeptide synthesis is from N- to C-terminus.
		The completed polypeptide chain must be processed in one or more ways before it assumes its role as a mature protein or peptide.
	opbs.okstate.edu /~melcher/MG/MGW2/MG24.html (492 words)

	Answer Key for 1403 Re (Site not responding. Last check: 2007-10-26)
		Compare and contrast prokaryotic abilities to increase rate of synthesis of a particular polypeptide with the abilities of eukaryotic cells to do the same.
		Prokaryotes have several means at their disposal to increase the rate of a polypeptide's synthesis.
		There are several other features that are part of the nature of prokaryotic cells that lead to increased rates of polypeptide synthesis.
	www2.tltc.ttu.edu /dini/key2b(1403)02.htm (670 words)

	Botany online: Molecular Genetics - Protein Biosynthesis - Translation (Site not responding. Last check: 2007-10-26)
		The synthesis of a polypeptide chain occurs catalytically.
		The already mentioned 'factors' are proteins that are needed for the initiation, elongation and the termination of the polypeptide chain.
		As soon as part of the mRNA is set free by the ribosome is it bound by a further ribosome so that the synthesis of a second polypeptide chain can already be initiated before the first is finished.
	www.biologie.uni-hamburg.de /b-online/e21/21d.htm (905 words)

	Protein Synthesis PAGE 9 (Site not responding. Last check: 2007-10-26)
		Figure 12: Polypeptides are constructed at ribosomes with the aide of ribosomal RNA which act a ribosomal enzymes (ribozymes) using the instructions supplied by mRNA with the help of tRNAs which bring amino acids to the construction site.
		So in those cases, the polypeptide produced by the ribosome IS the functional protein.
		The classic example of this is the protein that is used in red blood cells to carry oxygen and carbon dioxide in the blood.
	www.bergen.org /ACADEMY/Bio/cellbio/cellbio1protsynpg9.html (279 words)

	Untitled Document
		This polypeptide chain is then folded into a unique protein used in a particular cell function.
		At this point the translation will stop and the completed polypeptide chain will disconnect to be folded into a complete protein.
		If the polypeptide chain is changed enough then the resulting protein may not function correctly.
	biology.unm.edu /ccouncil/Biology_124/Summaries/T&T.html (1272 words)

	RNA synthesis
		The proteins of the ribosomes catalyze all of the functions of polypeptide synthesis.
		Synthesis of RNA exhibits several features that are synonymous with DNA replication.
		These introns are spliced by a specific splicing endonuclease that utilizes the energy of ATP hydrolysis to catalyze intron removal and ligation of the two exons together.
	www.med.unibs.it /~marchesi/rna.html (1872 words)

	[No title]
		The polypeptide starts to fold spontaneously as it emerges from the ribosome into a folded protein.
		The job may be the most complex synthesis in the cell, requiring these components: ribosomes an mRNA all the various tRNA’s with their attached amino acids many proteins having different functions cations, and GTP That’s the book.
		More on Termination At some point the polypeptide is complete; the ribosome reaches a Stop Codon The two ribosomal subunits separate and fall off the mRNA And the polypeptide disengages from the ribosome.
	www.ocf.berkeley.edu /~kishang/bio3/Translation_L.doc (1091 words)

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