New NIST reference material for peptide analysis

May 25, 2007

The National Institute of Standards and Technology (NIST) has issued its first-ever reference material designed to improve the performance and reliability of experiments to measure the masses and concentrations of peptides in biomolecular samples. The new reference material is expected to be an important tool in the analysis of proteins, both for disease diagnosis and drug discovery.

Proteomics—the study of proteins and the roles they play in biology—is one of the most fertile fields of modern medical research. Proteins typically are very large molecules, built of hundreds or thousands of amino acids, but they can be divided into smaller units, chains of about 50 or fewer amino acids. These are peptides. The usual way to analyze proteins is to chop them into their constituent peptides (generally with enzymes that cut through them at specific sites), sort the various peptides out using a chemical separation technique like high performance liquid chromatography (HPLC), and then determine the mass of each peptide using mass spectroscopy.

One big uncertainty in this process is that the peptide fragments differ in size, electrical charge and physical properties (such as the speed in which they separate under HPLC.) Chemists are accustomed to using well-known reference samples as chemical rulers to calibrate their analysis instrumentation, but until now there have been no such reference samples of peptides.

The need for this peptide reference material has been long recognized by the Association of Biomolecular Resource Facilities (ABRF), a non-profit standards organization created by representatives from industry firms, universities and government agencies. In collaboration with NIST, the ABRF created a Peptide Standards Project Committee to design and characterize three synthetic peptides to serve as the basis for a NIST peptide reference material. NIST RM 8327, "Peptide Reference Material for Molecular Mass and Purity Measurements," consists of three peptides from 11, 14 and 26 amino acid residues in length, with net charges of -3, -1 and +3. These three synthetic peptides were designed to provide long-term stability (do not contain methionine, cysteine and tryptophan), a range of purities, a range of molecular masses, protease cleavage sites, and contain tyrosine to enable concentration analysis by UV spectroscopy.

Source: National Institute of Standards and Technology (NIST)

Explore further: Nanodot team aims to charge phones in less than a minute

Related Stories

Nanodot team aims to charge phones in less than a minute

November 25, 2014

The world of smartphone users, which is a very large base indeed, is ripe for better battery solutions and an Israel-based company has an attractive solution in store, in the form of nanodot batteries that charge in less ...

The most complete review of the peptide behind Alzheimer's

March 30, 2015

The hope is to be able, one day, to fight the pathogenic action of the amyloid-beta protein, whose build-up is associated with Alzheimer's disease. In the meantime, scientists—including a group from the International School ...

Antibiotics give rise to new communities of harmful bacteria

February 23, 2015

Most people have taken an antibiotic to treat a bacterial infection. Now researchers from the University of North Carolina at Chapel Hill and the University of San Diego, La Jolla, reveal that the way we often think about ...

Perfume could be the riskiest gift you'll ever buy

February 16, 2015

When it comes to making careful plans to impress that significant other, certain things can seem like musts. Classy restaurant – check. Romantic atmosphere – check. Best suit or little black dress – check.

Recommended for you

New Horizons team selects potential Kuiper Belt flyby target

August 29, 2015

NASA has selected the potential next destination for the New Horizons mission to visit after its historic July 14 flyby of the Pluto system. The destination is a small Kuiper Belt object (KBO) known as 2014 MU69 that orbits ...

Interactive tool lifts veil on the cost of nuclear energy

August 24, 2015

Despite the ever-changing landscape of energy economics, subject to the influence of new technologies and geopolitics, a new tool promises to root discussions about the cost of nuclear energy in hard evidence rather than ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.