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Volumn 132, Issue 16, 2010, Pages 5677-5686

Uncovering the design rules for peptide synthesis of metal nanoparticles

Author keywords

[No Author keywords available]

Indexed keywords

AMINO ACID RESIDUES; AMINO ACID SEQUENCE; AU NANOPARTICLE; BINDING STRENGTH; BIOCOMPATIBLE METALS; BIOLOGICAL SOURCES; CAPPING AGENT; DESIGN RULES; GOLD NANOPARTICLES; KNOWLEDGE EXTRACTION; METAL NANOPARTICLES; METAL NANOSTRUCTURE; MULTIFUNCTIONAL REAGENTS; NANOPLATES; NET CHARGES; NUCLEATION AND GROWTH; PEPTIDE DESIGN; PEPTIDE SEQUENCES; PEPTIDE SYNTHESIS; RATIONAL DESIGN; SHAPE-CONTROLLED; STRATEGIC PLACEMENT;

EID: 77952565030     PISSN: 00027863     EISSN: 15205126     Source Type: Journal    
DOI: 10.1021/ja907454f     Document Type: Article
Times cited : (294)

References (51)
  • 38
    • 77952573510 scopus 로고    scopus 로고
    • The following one-letter abbreviations are used for the 20 natural α-amino acids (X): A, alanine; C, cysteine; D, aspartic acid; E, glutamic acid; F, phenylalanine; G, glycine; H, histidine; I, isoleucine; K, lysine; L, leucine; M, methionine; N, asparagine; P, proline; Q, glutamine; R, arginine; S, serine; T, threonine; V, valine; W, tryptophan; Y, tyrosine
    • The following one-letter abbreviations are used for the 20 natural α-amino acids (X): A, alanine; C, cysteine; D, aspartic acid; E, glutamic acid; F, phenylalanine; G, glycine; H, histidine; I, isoleucine; K, lysine; L, leucine; M, methionine; N, asparagine; P, proline; Q, glutamine; R, arginine; S, serine; T, threonine; V, valine; W, tryptophan; Y, tyrosine.
  • 46
    • 77952580468 scopus 로고    scopus 로고
    • A is the binding constant
    • A is the binding constant.
  • 47
    • 77952576447 scopus 로고    scopus 로고
    • For ease of visualization, the binding rating, which is the equilibrium surface coverage of the peptide in question on gold normalized by the equilibrium surface coverage of QHQHQHQ, was multiplied by a factor of 3 (Figure 3 c)
    • For ease of visualization, the binding rating, which is the equilibrium surface coverage of the peptide in question on gold normalized by the equilibrium surface coverage of QHQHQHQ, was multiplied by a factor of 3 (Figure 3 c).
  • 48
    • 77952579418 scopus 로고    scopus 로고
    • Based on the rating scheme I in Figure 2 using XWXWXWX peptide
    • Based on the rating scheme I in Figure 2 using XWXWXWX peptide.
  • 49
    • 77952576606 scopus 로고    scopus 로고
    • note
    • Since W was used as the common reducing residue in the W-X peptide sequence, the major difference between the reduction capabilities of the 20 interdigitated peptides should be contributed by the X residue. However, it was found that the reduction capability of a W-X peptide is not a linear sum of the capabilities of its amino acid constituents. For example, tyrosine (Y), which showed fairly good reduction capability on its own, actually downgraded the reactivity of W more so than other amino acids when it was incorporated as the W-Y sequence (Figure 2 b). This result shows that the intrinsic reduction property of an amino acid (X) is less influential than its binding affinity in affecting the overall reduction performance of an interdigitated peptide. This is even true when the strongest reducing amino acid (i.e., W) was used as the common interdigitated residue. Hence, the Δ H contribution from the intrinsic reduction capability of X is minor compared to the Δ S contribution, and the Δ G in the peptide reduction of metal precursor is controlled by the entropy effect.
  • 50
    • 77952573927 scopus 로고    scopus 로고
    • 7. This is because the smaller number of gold-binding sites (two vs seven) would not impose a strong compensational effect on gold ion reduction
    • 7. This is because the smaller number of gold-binding sites (two vs seven) would not impose a strong compensational effect on gold ion reduction.
  • 51
    • 77952573243 scopus 로고    scopus 로고
    • We have also carried out experiments in which a single amino acid residue (W, Y, or F) was inserted between the shape-directing sequences. The self-regulation effect was absent in this case, and the reduction rate follows the reduction capability of the inserted residue, decreasing in the following order: SEKL W GASL > SEKL Y GASL > SEKL F GASL. Hence, self-regulation in a homodipeptide sequence would elevate the more prominent feature of the amino acid involved (e.g., for W, it is the reduction capability)
    • We have also carried out experiments in which a single amino acid residue (W, Y, or F) was inserted between the shape-directing sequences. The self-regulation effect was absent in this case, and the reduction rate follows the reduction capability of the inserted residue, decreasing in the following order: SEKL W GASL > SEKL Y GASL > SEKL F GASL. Hence, self-regulation in a homodipeptide sequence would elevate the more prominent feature of the amino acid involved (e.g., for W, it is the reduction capability).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.