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Volumn 131, Issue 25, 2009, Pages 9046-9054

Quenched ligand-directed tosylate reagents for one-step construction of turn-on fluorescent biosensors

Author keywords

[No Author keywords available]

Indexed keywords

AFFINITY LIGANDS; ANALYTES; ANALYTICAL TOOL; BACTERIAL CELL LYSATE; BIOLOGICALLY RELEVANT MOLECULES; CARBONIC ANHYDRASE II; FLUORESCENCE QUENCHERS; LABELED PROTEINS; LABELING STEPS; NATURAL LIGANDS; NATURAL PROTEINS; NOVEL METHODS; ORGANIC DYE; PHOSPHOTYROSINE; PROTEIN FRAMEWORKS; PROTEIN LABELING; PROTEIN LIGANDS; SH2 DOMAIN; SPECIFIC DETECTION; SRC HOMOLOGY 2 DOMAINS; SYNTHETIC PROBES;

EID: 67649628228     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja902486c     Document Type: Article
Times cited : (68)

References (77)
  • 57
    • 67649613241 scopus 로고    scopus 로고
    • note
    • As described in the caption of Figure 3b, we performed the labeling reaction and fluorescence titration under the conditions in which the concentrations of the LDT reagent (1 equiv of CAII) and CAII are sufficiently higher than the dissociation constant of the sulfonamide ligand to maintain the complex formation. We also confirmed that when the labeling is carried out in the presence of an excess amount of CAII, the cleaved sulfonamide-DABCYL conjugate is transferred from the DEAC-labeled CAII to unmodified CAII (data not shown).
  • 58
    • 67649604731 scopus 로고    scopus 로고
    • note
    • After the labeling reaction (30 μM CAII, 30 μM 2), ∼50% of the total LDT reagent 2 was used for the labeling, 20% of that was hydrolyzed, and 30% remained intact. Since the affinity of the sulfonamide ligand is high, only the free and small DEAC fragment generated by hydrolysis can be removed by a short gel column we used (that is, other sulfonamide-containing components including the cleaved sulfonamide-DABCYL conjugate and intact reagent 2 remains bound to CAII). In agreement with this, the absorbance ratio at 427 and 474 nm (427/474) was decreased from 2.00 to 1.76 after the gel filtration, as shown in Figure S2.
  • 72
    • 67649628664 scopus 로고    scopus 로고
    • note
    • The calculated molecular weights of the p85-nSH2 domain and its singly DEAC-labeled derivative are 13141.68 and 13472.06, respectively.
  • 74
    • 0030950608 scopus 로고    scopus 로고
    • According to the sequence alignment of various SH2 domains, many SH2 domains possess a His residue at the same (or almost same) location with the His407 of the p85-nSH2 domain. Thus, it is reasonable to expect that the present strategy can be efficiently applied to the labeling of other SH2 domains by simply modifying the recognition sequence
    • According to the sequence alignment of various SH2 domains, many SH2 domains possess a His residue at the same (or almost same) location with the His407 of the p85-nSH2 domain. Thus, it is reasonable to expect that the present strategy can be efficiently applied to the labeling of other SH2 domains by simply modifying the recognition sequence. Kuriyan, J.; Cowburn, D. Annu. Rev. Biophys. Biomol. Struct. 1997, 26, 259.
    • (1997) Annu. Rev. Biophys. Biomol. Struct. , vol.26 , pp. 259
    • Kuriyan, J.1    Cowburn, D.2
  • 75
    • 67649577141 scopus 로고    scopus 로고
    • note
    • 0).
  • 76
    • 67649631728 scopus 로고    scopus 로고
    • note
    • We also confirmed that the UV-visible spectrum of the fraction containing the SH2 domain after the gel filtration showed absorption bands of both the DEAC and DABCYL groups as with the case of the CAII experiments.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.