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Volumn 112, Issue 26, 2008, Pages 7894-7902

Estimating the "steric clash" at cis peptide bonds

Author keywords

[No Author keywords available]

Indexed keywords

AMIDES; NETWORK PROTOCOLS; SEPARATION;

EID: 47749086992     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp711082d     Document Type: Article
Times cited : (8)

References (75)
  • 10
    • 0026055156 scopus 로고    scopus 로고
    • For examples of biological implications of non-prolyl cis peptide bonds, see, a Herzberg, O, Moult, J. O. Proteins: Struct, Funct, Genet. 1991, 11, 223
    • For examples of biological implications of non-prolyl cis peptide bonds, see. (a) Herzberg, O.; Moult, J. O. Proteins: Struct., Funct, Genet. 1991, 11, 223.
  • 31
    • 84906363556 scopus 로고    scopus 로고
    • A comprehensive database on Non-proline cis peptide bonds in proteins is available at: http://www.imb-jena.de/ImgLibDoc/cispep/ non_proline/IMAGE_CISPEP2.html.
    • A comprehensive database on Non-proline cis peptide bonds in proteins is available at: http://www.imb-jena.de/ImgLibDoc/cispep/ non_proline/IMAGE_CISPEP2.html.
  • 32
    • 84906409085 scopus 로고    scopus 로고
    • Updating the analyses of refs 3-5 examination of a more recent non-redundant subset of the Protein Data Bank (1908 proteins with less than 50% identity, and with resolution factor better than 1.8 Å) shows that 5.3% of X-Pro peptide bonds are in a cis conformation, whereas this percentage drops to 0.055% for X-nonPro peptide bonds (Sanejouand, Y.-H, personal communication, Laboratoire Joliot-Curie, Ecole Normule Supérieure, Lyon, 2007). The trend to raise the latter ratio as the resolution factor improves was already discussed in refs 4 and 5.
    • Updating the analyses of refs 3-5 examination of a more recent non-redundant subset of the Protein Data Bank (1908 proteins with less than 50% identity, and with resolution factor better than 1.8 Å) shows that 5.3% of X-Pro peptide bonds are in a cis conformation, whereas this percentage drops to 0.055% for X-nonPro peptide bonds (Sanejouand, Y.-H, personal communication, Laboratoire Joliot-Curie, Ecole Normule Supérieure, Lyon, 2007). The trend to raise the latter ratio as the resolution factor improves was already discussed in refs 4 and 5.
  • 66
    • 84906394570 scopus 로고    scopus 로고
    • Seeing NEP as 1,4-dimethyl N-methylacetamide, the amide main frame can adopt trans or cis arrangements (E or Z stereoisomers, respectively). With respect to this main frame, the terminal methyl groups keep in both cases a synclinal gauche conformation, but this corresponds to clear trans and cis positions relative to each other, as can be seen in Figure 1. This is why we will use the simple labelling tt and cc.
    • Seeing NEP as 1,4-dimethyl N-methylacetamide, the amide main frame can adopt trans or cis arrangements (E or Z stereoisomers, respectively). With respect to this main frame, the terminal methyl groups keep in both cases a synclinal gauche conformation, but this corresponds to clear trans and cis positions relative to each other, as can be seen in Figure 1. This is why we will use the simple labelling tt and cc.
  • 67
    • 84906363557 scopus 로고    scopus 로고
    • Seeing n-hexane as 1,4-dimethyl n-butane, the main frame is fixed here in anti-periplanar and syn-periplanar conformations (sometimes improperly designated as s-trans or s-cis, respectively). With respect to this main frame, the terminal methyl groups again keep a synclinal gauche position in both cases, and it appears from Figure 2 that they assume trans and cis relative orientations, respectively. For the sake of comparison, we will therefore keep a tt and cc labelling, while the strict designations are gag and gsg, respectively.
    • Seeing n-hexane as 1,4-dimethyl n-butane, the main frame is fixed here in anti-periplanar and syn-periplanar conformations (sometimes improperly designated as s-trans or s-cis, respectively). With respect to this main frame, the terminal methyl groups again keep a synclinal gauche position in both cases, and it appears from Figure 2 that they assume trans and cis relative orientations, respectively. For the sake of comparison, we will therefore keep a tt and cc labelling, while the strict designations are gag and gsg, respectively.
  • 68
    • 84906394571 scopus 로고    scopus 로고
    • 2p, syn (s-cis), corresponding to the rotational barrier, is a saddle point of index 1.
    • 2p, syn (s-cis), corresponding to the rotational barrier, is a saddle point of index 1.
  • 69
    • 84906377895 scopus 로고    scopus 로고
    • -5 au.
    • -5 au.
  • 71
    • 0001737663 scopus 로고    scopus 로고
    • Allinger, N. L.; Fermann, J. T.; Allen, W. D.; Schaefer, H. F J. Chem. Phys. 1997, 106, 5143. More results can be found on the web at http://cmt.dur.ac.uk/sjc/lhesis_dlc/node100.html.
    • (b) Allinger, N. L.; Fermann, J. T.; Allen, W. D.; Schaefer, H. F J. Chem. Phys. 1997, 106, 5143. More results can be found on the web at http://cmt.dur.ac.uk/sjc/lhesis_dlc/node100.html.
  • 72
    • 84906409081 scopus 로고    scopus 로고
    • Strictly speaking, the bond separation energy (BSE) would correspond to the opposite way in equations (1) and (2, As written here, their energies should be designed as bond association energies BAE, We choose to keep the former widespread acronym. Positive BSE therefore means the bonds are unstabilized when combined
    • Strictly speaking, the bond separation energy (BSE) would correspond to the opposite way in equations (1) and (2). As written here, their energies should be designed as bond association energies (BAE). We choose to keep the former widespread acronym. Positive BSE therefore means the bonds are unstabilized when combined.
  • 75
    • 84906363552 scopus 로고    scopus 로고
    • These effects deserve to be studied elsewhere, the present work only address the steric effects
    • These effects deserve to be studied elsewhere, the present work only address the steric effects.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.