Hydroxylamine HCl. (Cat. # BC80) think proteins! think G-Biosciences

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1 532PR 01 G-Biosciences A Geno Technology, Inc. (USA) brand name Hydroxylamine HCl (Cat. # BC80) think proteins! think G-Biosciences

2 INTRODUCTION... 3 ITEM(S) SUPPLIED... 4 STORAGE CONDITIONS... 4 PROPERTIES... 4 STRUCTURE... 4 IMPORTANT INFORMATION... 4 PROTOCOL 1: DEACETYLATION OF SATA MODIFIED PROTEINS... 5 ADDITIONAL ITEM(S) REQUIRED... 5 DEACETYLATION... 5 PROTOCOL 2: CLEAVAGE OF PROTEIN CROSS LINKER EGS PROTOCOL 3: PLASMID MUTAGENESIS... 6 ADDITIONAL ITEM(S) REQUIRED... 6 HYDROXYLAMINE MUTAGENESIS... 6 DNA PURIFICATION WITH GET CLEAN DNA... 6 REFERENCES... 6 RELATED PRODUCTS... 7 Page 2 of 8

3 INTRODUCTION Hydroxylamine HCl is a reducing agent that is routinely used for the deacetylation of SATA to form free sulfhydryls (Figure 1), for cleavage of protein cross linkers that contain carbonyl groups (i.e. EGS (Cat. # BC09)) and for mutagenesis of plasmid DNA. Figure 1: Generation of free sulfhydryls with SATA and hydroxylamine. Hydroxylamine converts aldehydes and ketones (carbonyls) to their oxime derivative in weak bases, therefore cross linkers and other compounds with carbonyl groups are cleavable with hydroxylamine HCl. SATA and SATP are modification reagents that add a sulfhydryl group to primary amines on biomolecules. The initial modification results in the addition of an acetyl protected sulfur enabling storage of the biomolecule. To generate a free sulfhydryl the biomolecule is treated with hydroxylamine to remove the protecting acetyl group (see figure). EGS and sulfo EGS are homobifunctional, succinimidyl ester, amine reactive crosslinkers that are resistant to cleavage by denaturants used in SDS PAGE conditions, but may be cleaved with hydroxylamine. Page 3 of 8

4 ITEM(S) SUPPLIED Cat. # Description Size BC80 Hydroxylamine HCl 25g STORAGE CONDITIONS Shipped at ambient temperature. Upon receipt, store desiccated at room temperature. PROPERTIES Synonym: Hydroxylammonium chloride Linear formula: NH 2 OH HCl CAS # Molecular weight: Form: White crystalline powder STRUCTURE IMPORTANT INFORMATION Hydroxylamine HCl is more stable to oxidation than the free base form, however always prepare the solutions immediately before use and store the product dessicated. Hydroxylamine HCl is soluble in polar solvents such as water, ethanol, methanol, glycerol and propylene glycol. Page 4 of 8

5 PROTOCOL 1: DEACETYLATION OF SATA MODIFIED PROTEINS Additional Item(s) Required Reaction Buffer. We recommend our Optimizer Buffer III (Cat. # BKC 06) or PBS supplemented with 5 25mM EDTA SATA modified protein (1 10mg/ml) Desalting columns. SpinOUT GT 600, 5ml, Cat. # X PBS supplemented with 10mM EDTA Deacetylation 1. Immediately before use, prepare a 0.5M solution of hydroxylamine in the Reaction Buffer. Use 35mg for every 1ml Reaction Buffer. 2. Combine 1ml SATA modified protein with 100µl freshly prepared 0.5M hydroxylamine HCl. 3. Mix and incubate at room temperature for 2 hours. 4. The excess hydroxylamine can be removed by desalting. We recommend our SpinOUT GT 600, 5ml columns (Cat. # ). PROTOCOL 2: CLEAVAGE OF PROTEIN CROSS LINKER EGS 1 1. Immediately before use, prepare 2M hydroxylamine HCl in phosphate buffer at ph8.5. Adjust ph back to 8.5 after dissolving the hydroxylamine HCl in the buffer. 2. Rapidly warm the solution to 37 C and incubate with equal volumes of cross linked samples for 3 6 hours with constant rotation or mixing. 3. The excess hydroxylamine can be removed by desalting. We recommend our SpinOUT GT 600, 5ml columns (Cat. # ). 4. To determine the effect of cleavage, analyze the proteins by denaturing SDS PAGE. Page 5 of 8

6 PROTOCOL 3: PLASMID MUTAGENESIS Derived from the protocol of Rose and Fink 2. Additional Item(s) Required Sterile Molecular Grade Water. Molecular Grade Water (Cat. # , ) 5M NaOH Plasmid DNA DNA Clean Up Columns. GET CLEAN DNA (Cat. # , ) Hydroxylamine Mutagenesis 1. Immediately before use, prepare a 1M solution of hydroxylamine by adding 0.35g hydroxylamine HCl to 450µl 5M NaOH and 4.55ml ice cold. Sterile molecular grade water. If necessary, adjust ph to ~6.7 and keep solution on ice. 2. Incubate 10µg plasmid DNA with 500µl hydroxylamine solution for 20 hours at 37 C in a sealed tube. DNA Purification with GET Clean DNA 1. Add 5 volumes of Binding Buffer to 1 volume of the hydroxylamine:dna sample. 2. To bind the DNA, apply the sample to the spin column in 750µl aliquots and centrifuge for seconds at 14,000 16,000g. Repeat until entire sample is loaded. 3. Discard the flow through. Place the column back into the same collection tube. 4. Add 750µl of DNA wash to the column and centrifuge for seconds at 14,000 16,000g. 5. Discard flow through and place column back in the collection tube. Centrifuge column at 14,000 16,000g for an additional one minute. This ensures that all DNA wash is removed. 6. Place column in a clean collection tube and elute the DNA by adding 50µl prewarmed TE buffer or water to the center of the membrane in the column and incubate at room temperature for 1 minute. Centrifuge for 1 minute at 14,000 16,000g. NOTE: Alternatively, the sample can be eluted twice using half the recommended volume each time (2 x 25µl). For DNA fragments or plasmids >5kb increase TE buffer incubation to 5 10 minutes at C. REFERENCES 1. Abdella et al (1979) Biochem. Biophys. Res. Comm. 87: Rose, M.D. and Fink, G.R. (1987) Cell 48:1047 Page 6 of 8

7 RELATED PRODUCTS Download our Protein Cross linkers and Protein Labeling and Conjugation Handbooks. protein cross linkers handbook/ protein labeling conjugation handbook/ For other related products, visit our website at or contact us. Last saved: 6/5/2013 CMH Page 7 of 8

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