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Key Documents

N7009

Sigma-Aldrich

2-Nitro-5-thiocyanatobenzoic acid

≥98% (HPLC)

Synonym(s):

2-Nitro-5-thiocyanobenzoic acid, NTCB

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About This Item

Linear Formula:
O2NC6H3(SCN)CO2H
CAS Number:
Molecular Weight:
224.19
Beilstein:
2124001
EC Number:
MDL number:
UNSPSC Code:
12352209
PubChem Substance ID:
NACRES:
NA.26

product name

2-Nitro-5-thiocyanatobenzoic acid, powder

Assay

≥98% (HPLC)

Quality Level

form

powder

color

yellow

mp

156-157 °C (lit.)

storage temp.

2-8°C

SMILES string

OC(=O)c1cc(SC#N)ccc1[N+]([O-])=O

InChI

1S/C8H4N2O4S/c9-4-15-5-1-2-7(10(13)14)6(3-5)8(11)12/h1-3H,(H,11,12)

InChI key

NQUNIMFHIWQQGJ-UHFFFAOYSA-N

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Application


  • Site-Specific Conversion of Cysteine in a Protein to Dehydroalanine Using 2-Nitro-5-thiocyanatobenzoic Acid: This research demonstrates the use of 2-Nitro-5-thiocyanatobenzoic acid in protein engineering to modify cysteine residues, which is critical for developing therapeutic proteins and understanding protein structure-function relationships (Qiao et al., 2021).

  • Scrapie prion protein structural constraints obtained by limited proteolysis and mass spectrometry: Highlights the utility of 2-Nitro-5-thiocyanatobenzoic acid in the study of prion proteins, providing insights into protein misfolding diseases which can lead to novel therapeutic approaches (Sajnani et al., 2008).

  • Localization of a substrate binding domain of the human reduced folate carrier to transmembrane domain 11 by radioaffinity labeling and cysteine-substituted accessibility methods: Utilizes 2-Nitro-5-thiocyanatobenzoic acid in biochemical assays to understand transporter proteins, essential for drug delivery and targeting (Hou et al., 2005).

  • A novel procedure for the preparation of biologically active recombinant peptides using a cyanylation reaction: Describes a method using 2-Nitro-5-thiocyanatobenzoic acid for peptide synthesis, beneficial for the development of peptide-based pharmaceuticals (Koyama et al., 1994).

Biochem/physiol Actions

2-nitro-5-thiocyanatobenzoic acid (NTCB) is commonly used to cyanylate and cleave proteins at cysteine residues.

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

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

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

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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Maya Belghazi et al.
Molecular and cellular endocrinology, 247(1-2), 175-182 (2006-02-07)
Luteinizing hormone (LH) like all other glycoprotein hormones is composed of two dissimilar subunits, alpha and beta, that are non-covalently associated. The heterodimer is stabilized by a region of the beta-subunit called the "seatbelt" because it wraps around the alpha-subunit
R Daniel et al.
The Journal of biological chemistry, 272(43), 26934-26939 (1997-10-27)
Escherichia coli dihydroorotase contains six cysteines/subunit, which are potential ligands of structural and catalytic zinc metals at protein sites of the enzyme. Specific thiol reagents modify, in nondenaturing conditions only, two of these cysteines; these two residues are thought to
Z Xie et al.
Journal of neurochemistry, 93(4), 1038-1046 (2005-04-29)
Apolipoprotein J (apoJ; also known as clusterin and sulfated glycoprotein (SGP)-2) is associated with senile plaques in degenerating regions of Alzheimer's disease brains, where activated microglia are also prominent. We show a functional link between apoJ and activated microglia by
J Bubis et al.
Archives of biochemistry and biophysics, 395(2), 146-157 (2001-11-08)
Modification of transducin (T) with iodoacetic acid (IAA) inhibited its light-dependent guanine nucleotide-binding activity. Approximately 1 mol of [(3)H]IAA was incorporated per mole of T. Cys(347), located on the alpha-subunit of T (T(alpha)), was identified as the major labeled residue
Hsin-Yao Tang et al.
Analytical biochemistry, 334(1), 48-61 (2004-10-07)
The reagent 2-nitro-5-thiocyanatobenzoic acid (NTCB) is commonly used to cyanylate and cleave proteins at cysteine residues, but this two-step reaction requires lengthy incubations and produces highly incomplete cleavages. In previous reports, incomplete cleavage was attributed to a competing beta-elimination reaction

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