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4-Azido-L-phenylalanine

Alias: pAzF; H-4-Azido-Phe-OH; 4-Azido-L-phenylalanine; L-Phe(4-azido)-OH; 4-Azido-L-phenylalanine; 33173-53-4; H-P-AZIDO-PHE-OH; 4-Azidophenylalanine; (S)-2-Amino-3-(4-azidophenyl)propanoic acid; p-azidophenylalanine; p-azido-l-phenylalanine; (2S)-2-amino-3-(4-azidophenyl)propanoic acid;
Cat No.:V9562 Purity: =100%
4-Azido-L-phenylalanine is an unnatural amino acid (AA) that reports on the local protein environment.
4-Azido-L-phenylalanine
4-Azido-L-phenylalanine Chemical Structure CAS No.: 33173-53-4
Product category: New12
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
50mg
100mg
250mg
500mg
1g
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Other Forms of 4-Azido-L-phenylalanine:

  • 4-Azido-L-phenylalanine hydrochloride
Official Supplier of:
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Purity & Quality Control Documentation

Purity: =100%

Product Description
4-Azido-L-phenylalanine is an unnatural amino acid (AA) that reports on the local protein environment. 4-Azido-L-phenylalanine is a click chemical reagent. It has an Azide (N3) moiety and could undergo CuAAc (copper-catalyzed azide-alkyne cycloaddition reaction) with compounds bearing an Alkyne group. SPAAC (Strain-promoted alkyne-azide cycloaddition) may also happen with compounds bearing a BCN or DBCO group.
Biological Activity I Assay Protocols (From Reference)
Targets
Click chemistry reagent; unnatural amino acid
ln Vitro
Modified soluble superfolded green fluorescent protein (sfGFP) containing 4-azido-L-phenylalanine or p-propargyloxy-L-phenylalanine (pPaF) would accumulate 0.9-1.7 mg/mL in CFPS solutions when using a cell-free protein synthesis (CFPS) technique [1].
Enzyme Assay
Twenty-five-microlitre PANOx SP reaction solutions contained, unless otherwise noted: 10 mM ammonium glutamate, 20 mM magnesium glutamate, 175 mM potassium glutamate, 1.2 mM ATP, 0.86 mM each of CMP, GMP and UMP, 10 mM dibasic potassium phosphate, 34 μg/ml folinic acid, 171 μg/ml E. coli tRNAs, 33 mM phosphoenolpyruvate (PEP), 1.5 mM spermidine, 1 mM putrescine, 0.33 mM nicotinamide adenine dinucleotide (NAD), 0.27 mM coenzyme A, 2.7 mM sodium oxalate, 2 mM each of the 20 amino acids, 5 μM l-[14C(U)]-leucine, 2 mM p-azido-l-phenylalanine (pAzF) or 4 mM p-propargyloxy-l-phenylalanine (pPaF), 0.3 mg/ml pAzFRS or 0.5 mg/ml pPaFRS (prepared as described above), 100 μg/ml T7 RNA polymerase, 6 nM sfGFP plasmid, 0.2 mg/ml linearized o-tRNA or o-tRNAopt plasmid template and either 0.24 volume of standard KC6 extract or 0.28 volume of orthogonal extract. The glutamate salts were diluted from a 10-fold concentrated (10×) solution. Similarly, a 10× NTMP Master Mix solution contained ATP, the three NMPs, folinic acid and the E. coli tRNAs, and was adjusted to pH 7.3 with dibasic potassium phosphate. The natural amino acids were diluted from a stock solution, which contained a 50 mM concentration of each amino acid. This stock solution was prepared by adding the amino acids in the following order (given in their one-letter code): R, V, W, F, I, L, C, M, A, N, D, E, G, Q, H, K, P, S, T, Y. During the preparation, it was ensured that each amino acid was dissolved before addition of the next, except tyrosine, which is added last and remains suspended in the solution. The reactions were incubated at 30°C for 16 h, unless stated otherwise. CFPS reactions containing pAzF were prepared in a dark room, and the tubes containing the reaction solutions were wrapped in aluminum foil to prevent photodissociation of the aromatic azide[1].
Cell Assay
The orthogonal S30 cell extract was prepared from KC6 cells harbouring the pDule-tRNA plasmid, as described. The lysate was not diluted after homogenization. The specific growth rate of this KC6/o-tRNA culture was 0.57 h−1 during the batch fermentation. The standard KC6 extract was prepared as described. After homogenization, 0.2 ml S30 buffer (14 mM magnesium acetate, 60 mM potassium acetate, 10 mM Tris acetate, pH 8.2) was added per ml of lysate, and the diluted lysate was dialysed against 100 volumes of S30 buffer at 4°C four times for 30 min each. Finally, the S30 cell extract was centrifuged at 10 000g and 4°C for 20 min, and the supernatant was aliquoted, flash-frozen and stored at −80°C. The specific growth rate of the KC6 culture was 0.96 h−1 during the fed-batch fermentation[1].
References

[1]. Cell-free co-production of an orthogonal transfer RNA activates efficient site-specific non-natural amino acid incorporation. Nucleic Acids Res. 2013 Jun;41(11):5949-63.

Additional Infomation
4-azido-L-phenylalanine is a 4-azidophenylalanine that has L-configuration. It is used as a bioorthogonal click-chemistry reagent. It is a 4-azidophenylalanine and a L-phenylalanine derivative. It is an enantiomer of a 4-azido-D-phenylalanine.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C9H10N4O2
Molecular Weight
206.205
Exact Mass
206.08
Elemental Analysis
C, 52.42; H, 4.89; N, 27.17; O, 15.52
CAS #
33173-53-4
Related CAS #
4-Azido-L-phenylalanine hydrochloride;34670-43-4
PubChem CID
3080772
Appearance
Typically exists as white to yellow solids at room temperature
LogP
1.735
Hydrogen Bond Donor Count
2
Hydrogen Bond Acceptor Count
5
Rotatable Bond Count
4
Heavy Atom Count
15
Complexity
267
Defined Atom Stereocenter Count
1
SMILES
O([H])C([C@]([H])(C([H])([H])C1C([H])=C([H])C(=C([H])C=1[H])N=[N+]=[N-])N([H])[H])=O
InChi Key
NEMHIKRLROONTL-QMMMGPOBSA-N
InChi Code
InChI=1S/C9H10N4O2/c10-8(9(14)15)5-6-1-3-7(4-2-6)12-13-11/h1-4,8H,5,10H2,(H,14,15)/t8-/m0/s1
Chemical Name
p-Azido-L-phenylalanine
Synonyms
pAzF; H-4-Azido-Phe-OH; 4-Azido-L-phenylalanine; L-Phe(4-azido)-OH; 4-Azido-L-phenylalanine; 33173-53-4; H-P-AZIDO-PHE-OH; 4-Azidophenylalanine; (S)-2-Amino-3-(4-azidophenyl)propanoic acid; p-azidophenylalanine; p-azido-l-phenylalanine; (2S)-2-amino-3-(4-azidophenyl)propanoic acid;
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
H2O : ~25 mg/mL (~121.24 mM)
DMSO : ~5 mg/mL (~24.25 mM)
Solubility (In Vivo)
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

Injection Formulations
(e.g. IP/IV/IM/SC)
Injection Formulation 1: DMSO : Tween 80: Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution 50 μL Tween 80 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO 400 μLPEG300 50 μL Tween 80 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).
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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO 100 μLPEG300 200 μL castor oil 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10: 10 : 80 (i.e. 100 μL Ethanol 100 μL Cremophor 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH 400 μLPEG300 50 μL Tween 80 450 μL Saline)


Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).
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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders


Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 4.8494 mL 24.2471 mL 48.4943 mL
5 mM 0.9699 mL 4.8494 mL 9.6989 mL
10 mM 0.4849 mL 2.4247 mL 4.8494 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

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An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
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  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
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  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
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In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

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