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Topic: Anticodon

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	anticodon (Site not responding. Last check: 2007-10-14)
		The anticodon region of a transfer RNA is a sequence of three bases that are complementary to a codon in the messenger RNA.
		During translation, the bases of the anticodon form complementary base pairs witht the bases of the codon by forming the appropriate hydrogen bonds.
		The amino acid phenylalanine is always covalently bonded to the tRNA with the anticodon UUU or UUC because these two codons specify the amino acid phenylalanine.
	academic.brooklyn.cuny.edu /biology/bio4fv/page/antico.htm (149 words)

	SparkNotes: DNA Translation: Transfer RNA
		Because anticodons bind with codons in antiparallel fashion, they are written from the 5' end to 3' end, the inverse of codons.
		The flexibility of some anticodons is the result of the fact that the 3' end of the anticodon is more spatially confined than the 5' end.
		As a result, the 5' end of the anticodon is free to hydrogen bond with several base groups located at the 3' position of the codon.
	www.sparknotes.com /biology/molecular/translation/section1.html (839 words)

	Transfer RNA - Wikipedia, the free encyclopedia
		The first anticodon base is sometimes modified to inosine (derived from adenine) or pseudouridine (derived from uracil).
		An anticodon (sometimes called nodoc from the reversed letters of the word codon) is a unit made up of three nucleotides that correspond to the three bases of the codon on the mRNA.
		Frequently, the first nucleotide of the anticodon is one of two not found on mRNA: inosine and pseudouridine, which can hydrogen bond to more than one base in the corresponding codon position.
	en.wikipedia.org /wiki/Anticodon (916 words)

	Structural Features of tRNALys Favored by Anticodon Nuclease as Inferred from Reactivities of Anticodon Stem and Loop ...
		Favored by Anticodon Nuclease as Inferred from Reactivities of Anticodon Stem and Loop Substrate Analogs
		anticodon loop and lower part of the anticodon stem (9).
		A37 rigidify the anticodon in a predominantly A-RNA stacked conformation.
	www.jbc.org /cgi/content/full/277/6/3836 (3714 words)

	Identification of specific Rp-phosphate oxygens in the tRNA anticodon loop required for ribosomal P-site binding -- ... (Site not responding. Last check: 2007-10-14)
		CCA end and the anticodon arm region (9-11).
		It was shown previously that only the anticodon stem-loop region interacts with the 30S subunit (10, 30).
		The three bases of the anticodon are in red.
	www.pnas.org /cgi/content/full/94/24/12823 (3740 words)

	Exercise 8. tRNA
		The region of the tRNA molecule that interacts with the messenger is known as the anticodon.
		In fact, the first nucleotide of the anticodon, position 34 in tRNA(Phe), which pairs with the third base of the codon, is known as the "wobble" base.
		For comparison, the same fit can be performed using a model in the B-conformation (brna.pdb), which will help show how closely the anticodon (part of a single stranded loop) mimics the A conformation of duplex RNA relative to the B conformation (which is not normally found).
	www.cgl.ucsf.edu /home/glasfeld/tutorial/trna/trna.html (1422 words)

	[5] Translation by tRNA
		Translation is carried out by tRNA through the relationship between its anticodon and the associated amino acid.
		When a tRNA is brought to the ribosome by the pairing between its anticodon and the mRNA's codon, the amino acid attached at its 3' end will be added to the growing peptide.
		The attached amino acid is encoded by the codon which matches the tRNA's anticodon.
	www.web-books.com /MoBio/Free/Ch5C4.htm (485 words)

	The Valine Anticodon and Valylatability of Peanut Clump Virus RNAs Are Not Essential but Provide a Modest Competitive ...
		(18), demonstrating the importance of an intact valine anticodon.
		During plant cell inoculation, the additional nucleotides are thought to be removed by exonuclease action and repair of the 3' CCA by CCA nucleotidyltransferase or by internal initiation during minus-strand synthesis.
		A GAC anticodon is present in the RNA2 TLS of PCV isolate PO2A.
	jvi.asm.org /cgi/content/full/74/18/8720 (4329 words)

	Wobble (Site not responding. Last check: 2007-10-14)
		Crick suggested that the base at the 5' end of the anticodon does not have as strict base-pairing requirements as the other two base pases, allowing it to form hydrogen bonds with several bases at the 3' end of the codon [Crick, 1966].
		This is especially true when the base at the 5' end of the anticodon is inosine (abbreviated I), it is particularly "wobbly".
		For each amino acid, the codons are shown to the left (written 5' to 3') and the cognate anticodons are shown on the right.
	www.sci.sdsu.edu /~smaloy/MicrobialGenetics/topics/rev-sup/wobble.html (438 words)

	Purine bases at position 37 of tRNA stabilize codon-anticodon interaction in the ribosomal A site by stacking and ...
		anticodon loop or the ribosome decoding center that is favored
		The anticodon loop is defined by the presence of a number of
		Rearrangements in the anticodon loop with binding to the ribosome
	www.rnajournal.org /cgi/content/full/10/1/90 (6116 words)

	SparkNotes: DNA Translation: Terms
		Anticodon - The sequence of three nucleotides located on the anticodon arm of the tRNA cloverleaf structure.
		The anticodon bonds in antiparallel fashion with a codon of mRNA at the acceptor site of a ribosome during translation.
		Contains the anticodon that base pairs with an mRNA codon during translation.
	www.sparknotes.com /biology/molecular/translation/terms.html (798 words)

	Molecular dynamics of the anticodon domain of yeast tRNA(Phe): Codon-anticodon interaction Biophysical Journal - Find ...
		Comparison of the dynamics in terms of interatomic or inter-residual distance fluctuation for the free and the bound domains showed regions of enhanced rigidity in the loop region in the presence of codons.
		Because the Y base is located at position 37 adjacent to the anticodon triplet, its fluorescence is sensitive to any changes in the conformation and the binding state of the anticodon loop.
		Though under normal physiological conditions Y37 was found in the low mobility state, the conformation with freely mobile Y37 was found to be the predominant one in the presence of codons.
	www.findarticles.com /p/articles/mi_qa3938/is_200011/ai_n8928009 (922 words)

	Layman (Site not responding. Last check: 2007-10-14)
		This was achieved by removing the anticodon loop, which has no significant role in stability, and substituting it with sequences that we believed would confer extra stability.
		So we replaced the anticodon stem/loop of tRNA (which is not involved in tertiary interactions) by two thermostable loops C(GCAA)G and G(CUUG)C, and by another tetraloop UUAA (a non-thermostable control).
		The remainder of the anticodon stem/loop was omitted.
	a-s.clayton.edu /hampikian/Research/tRNAposter.htm (2423 words)

	RNA Society of NC Monthly Featured Lab
		Many aaRSs bind to the anticodon portion of their matching (cognate) tRNA molecules, and the anticodon-binding site is often some distance removed from the enzyme active site, where amino acid attachment occurs.
		A microhelix mimic of the tRNAMet acceptor stem is sequence-specifically aminoacylated by MetRS, although the catalytic efficiency of the reaction is significantly decreased.
		In an attempt to re-establish communication between the anticodon and acceptor stem portions of tRNAMet, we are connecting the RNA microhelices with a flexible linker of varying length and sequence and using in vitro selection to identify improved RNA substrates.
	www.med.unc.edu /pmbb/featured.html (462 words)

	CONTRIBUTIONS TO CODON-ANTICODON RECOGNITION
		The wobble hypothesis made a sharp distinction between nucleotide pairings in the first two positions of the codon-anticodon associations, assumed to occur in a completely rigid geometry, and nucleotide pairings in the third position, assumed to occur in a looser geometry.
		However, I was distracted from this topic by my involvement in the development of the kinetic theory of accuracy ([4,5] and see Section on the kinetic theory of accuracy), the analysis of Gorini's ribosomal mutants, the next nucleotide effect, kinetic amplification, and all that.
		Articles are evaluated and accepted or rejected, first on the basis of geographic origin, second on the basis of their short-term "selling potential" (expected contribution to the impact factor), and rarely on the basis of scientific truth.
	www.lps.ens.fr /~ninio/Codon-rec.html (5353 words)

	HDS Figure 34 The human genetic code and associated tRNA genes (Site not responding. Last check: 2007-10-14)
		For each of the 64 codons, we show: the corresponding amino acid; the observed frequency of the codon per 10,000 codons; the codon; predicted wobble pairing to a tRNA anticodon (fl lines); an unmodified tRNA anticodon sequence; and the number of tRNA genes found with this anticodon.
		The modified anticodon sequence in the mature tRNA is not shown, even where post-transcriptional modifications can be confidently predicted (for example, when an A is used to decode a U/C third position, the A is almost certainly an inosine in the mature tRNA).
		The Figure also does not show the number of distinct tRNA species (such as distinct sequence families) for each anticodon; often there is more than one species for each anticodon.
	www.fmv.ulg.ac.be /genmol/MODGEN/Human_genetic_code.htm (192 words)

	tRNA-Mediated Transcription Antitermination in vitro: Codon-Anticodon Pairing Independent of the Ribosome.
		The specificity of the tRNA response is dependent on a single codon in the leader, which was postulated to pair with the anticodon of the corresponding tRNA.
		Sequence comparisons and mutational studies identified a single codon, displayed at a precise position within the leader RNA structure, that determines the specificity of the amino acid response, presumably by pairing with the anticodon of the cognate tRNA (2).
		Substitutions at the specifier sequence and antiterminator regions of the leader, and at the anticodon and acceptor end of the tRNA, are shown with arrows.
	www.euchromatin.net /Grundy01.htm (2963 words)

	Decoding of tandem quadruplets by adjacent tRNAs with eight-base anticodon loops -- Moore et al. 28 (18): 3615 -- ...
		Decoding of tandem quadruplets by adjacent tRNAs with eight-base anticodon loops
		is intraribosomal dissociation of anticodons from codons and
		anticodon loops, and re-pairing to mRNA at an overlapping codon
	nar.oxfordjournals.org /cgi/content/full/28/18/3615 (4963 words)

	Effects of modifying the tRNA(3Lys) anticodon on the initiation of human immunodeficiency virus type 1 reverse ...
		Effects of modifying the tRNA(3Lys) anticodon on the initiation of human immunodeficiency virus type 1 reverse transcription.
		In this work, the anticodon in a tRNA(3Lys) gene was changed from UUU to CUA (tRNA(3Lys)Su+) or, in addition, G-73 was altered to A (tRNA(3Lys)Su+G73A).
		These results indicate that the tRNA(3Lys)Su+ packaged into the virions is unable to act as a primer for RT, and a model is proposed to explain the disparate results between heat-annealed and in vivo-placed primer tRNA.
	www.aegis.com /aidsline/1996/oct/M96A0811.html (615 words)

	agrislab
		A second viral region, 5' to the viral PBS has complementarity to the anticodon stem/loop of tRNALys3 and may be involved in retention of lysine tRNA as primer.
		The tertiary structure of RNA is stabilized by the presence of modified nucleosides.
		C-stem/loop, anticodon stem and aminoacyl acceptor stem forms a complex with a 30mer corresponding to the completely unmodified D-stem/loop, anticodon stem, and aminoacyl stem in a Mg2+ containing native PAGE.
	www4.ncsu.edu /~agris (1186 words)

	Context-dependent anticodon recognition by class I lysyl-tRNA synthetases -- Söll et al. 97 (26): 14224 -- ... (Site not responding. Last check: 2007-10-14)
		Context-dependent anticodon recognition by class I lysyl-tRNA synthetases -- Söll et al.
		The pattern of anticodon recognition by LysRSs is dictated by their need to effectively compete for closely related tRNAs
		Further evidence that the presence of AsnRS dictates recognition of the anticodon nucleotides in tRNA
	www.pnas.org /cgi/content/full/97/26/14224 (3044 words)

	Two Residues in the Anticodon Recognition Domain of the Aspartyl-tRNA Synthetase from Pseudomonas aeruginosa Are ...
		Two Residues in the Anticodon Recognition Domain of the Aspartyl-tRNA Synthetase from Pseudomonas aeruginosa Are Individually Implicated in the Recognition of tRNAAsn -- Bernard et al.
		AspRSs are considered discriminating (_D) in the presence of an AsnRS and in the absence of an AdT in a given organism.
		is known to interact with base 36 of the anticodon (5, 10, 32).
	jb.asm.org /cgi/content/full/188/1/269 (3476 words)

	Functional Annotation of Class I Lysyl-tRNA Synthetase Phylogeny Indicates a Limited Role for Gene Transfer -- ...
		Changes in the anticodon nucleotides (nucleotides 34 to 36) are indicated.
		Nucleotide 26 is indicated and shown in boldface type, and the anticodon sequence is underlined.
		(e.g., those in reference 25) that the anticodon is a crucial
	jb.asm.org /cgi/content/full/184/16/4594 (3296 words)

	anticodon - OneLook Dictionary Search
		Tip: Click on the first link on a line below to go directly to a page where "anticodon" is defined.
		anticodon : Dorland's Illustrated Medical Dictionary [home, info]
		Anticodon : Drug Discovery and Development [home, info]
	www.onelook.com /?w=anticodon (142 words)

	Ch432_Lec_10April
		So called "hypermodified" bases are usually found adjacent to the anticodon 3' nucleotide when it is A or U. These bases probably function by strengthening the base-pairing in the codon-anticodon via creation of a more non-polar environment.
		The anticodon leg is composed of the D stem and the anticodon stem.
		Each leg is about 60Å (6 nm) long, with the acceptor and anticodon ends about 76Å apart.
	www.humboldt.edu /~rap1/C432.S02/C432Notes/C432n10Apr.html (1083 words)

	The pathogenic U3271C human mitochondrial tRNALeu(UUR) mutation disrupts a fragile anticodon stem -- Wittenhagen et al. ...
		structural integrity of the anticodon stem is lost in the presence
		In this tRNA, mutations producing CA mispairs in the D-stem and anticodon stem of hs mt tRNA
		by alterations in the anticodon stem and loop (25,26), the aminoacylation
	nar.oxfordjournals.org /cgi/content/full/31/2/596 (3115 words)

	Probing the Importance of tRNA Anticodon: Human Immunodeficiency Virus Type 1 (HIV-1) RNA Genome Complementarity with ...
		Probing the Importance of tRNA Anticodon: Human Immunodeficiency Virus Type 1 (HIV-1) RNA Genome Complementarity with an HIV-1 That Selects tRNAGlu for Replication -- Dupuy et al.
		A-loop is in a complex with the anticodon of
		nucleotides complementary to the anticodon of the tRNA on the
	jvi.asm.org /cgi/content/full/77/16/8756 (4997 words)

	Chapter 18 Translation
		One contains the anticodon, that is the complement of the codon sequence in the mRNA
		- the anticodon sequence is read 3'->5', so that the bases match up with the codon sequence, which is read 5'->3'
		A is never found in 5' of anticodon
	www.tnstate.edu /library/reserves/chapter_18.htm (1095 words)

	A tripeptide /`anticodon/' deciphers stop codons in messenger RNA : Nature
		A tripeptide 'anticodon' deciphers stop codons in messenger RNA
		Analysis with stop codons containing base analogues indicated that the C2 amino group of purine may be the primary target of discrimination of G from A.
		These findings show that the discriminator tripeptide of bacterial release factors is functionally equivalent to that of the anticodon of transfer RNA, irrespective of the difference between protein and RNA.
	origin.www.nature.com /doifinder/10.1038/35001115 (268 words)

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