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91917

Sigma-Aldrich

5,5,5-Trifluoro-DL-leucine

≥98.0% (sum of isomers, HPLC)

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Synonym(s):
(±)-2-Amino-4-(trifluoromethyl)pentanoic acid
Empirical Formula (Hill Notation):
C6H10F3NO2
CAS Number:
2792-72-5
Molecular Weight:
185.14
MDL number:
MFCD00039528
UNSPSC Code:
12352209
eCl@ss:
32160406
PubChem Substance ID:
329770097
NACRES:
NA.22

assay

≥98.0% (sum of isomers, HPLC)

form

crystals

reaction suitability

reaction type: solution phase peptide synthesis

application(s)

peptide synthesis

SMILES string

CC(CC(N)C(O)=O)C(F)(F)F

InChI

1S/C6H10F3NO2/c1-3(6(7,8)9)2-4(10)5(11)12/h3-4H,2,10H2,1H3,(H,11,12)

InChI key

XFGVJLGVINCWDP-UHFFFAOYSA-N

Related Categories

General description

5,5,5-Trifluoro-DL-leucine, also known as trifluoroleucine, is an analog of L-leucine amino acid, often used to synthesize highly fluorinated peptides.

Application

5,5,5-trifluoroleucine can be incorporated into the coiled-coil peptides to increase their thermal stability.

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Takahiro Oba et al.
Bioscience, biotechnology, and biochemistry, 70(7), 1776-1779 (2006-07-25)
We characterized a trifluoroleucine-resistant mutant of Saccharomyces cerevisiae, TFL20, that has a mutation in the LEU4 gene. We monitored the concentration of extracellular i-AmOH and intracellular amino acids, and compared the ratios of gene expression in TFL20 with the wild-type
B Bendoni et al.
FEMS microbiology letters, 180(2), 229-233 (1999-11-11)
The resistance to 5,5,5-trifluoro-DL-leucine, encoded by the dominant allele LEU4-1, was used as a selectable marker to transform laboratory and natural Saccharomyces cerevisiae strains by the lithium acetate procedure. Results of transformation of S. cerevisiae laboratory and wine natural strains
A Niemz et al.
Journal of the American Chemical Society, 123(30), 7407-7413 (2001-07-27)
We have investigated the effect of trifluoroleucine substitution on the membrane-binding and tetramerization behavior of melittin. Analogues were synthesized in which Leu 9, Leu 13, and all four intrinsic leucine residues of melittin were replaced by 5,5,5-trifluoroleucine. Both the mono-
E Casalone et al.
Research in microbiology, 148(7), 613-623 (1998-10-10)
Eighteen mutants resistant to 5',5',5'-trifluoroleucine (TFL), a leucine analog, were isolated in Saccharomyces cerevisiae strains YNN281 and YNN282. The mutants were characterized genetically and clustered in two groups, one comprising all the dominant (TFL1) and the other one all the
Stabilization of coiled-coil peptide domains by introduction of trifluoroleucine
Y Tang
Biochemistry, 40, 2790-2796 (2001)
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