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måndag 19 maj 2014

Milloin gluteeni keksittiin? Milloin sen rakenne selvitettiin?

On edistytty suuresti 1990 luvulta lähtien gluteenin rakenteen selvittämisessä. Nyyisin voidaan molekyylirakenne piirtää kaavana.

Philos Trans R Soc Lond B Biol Sci. Feb 28, 2002; 357(1418): 133–142.
PMCID: PMC1692935

The structure and properties of gluten: an elastic protein from wheat grain.


The wheat gluten proteins correspond to the major storage proteins that are deposited in the starchy endosperm cells of the developing grain. These form a continuous proteinaceous matrix in the cells of the mature dry grain and are brought together to form a continuous viscoelastic network when flour is mixed with water to form dough. These viscoelastic properties underpin the utilization of wheat to give bread and other processed foods. One group of gluten proteins, the HMM subunits of glutenin, is particularly important in conferring high levels of elasticity (i.e. dough strength). These proteins are present in HMM polymers that are stabilized by disulphide bonds and are considered to form the 'elastic backbone' of gluten. However, the glutamine-rich repetitive sequences that comprise the central parts of the HMM subunits also form extensive arrays of interchain hydrogen bonds that may contribute to the elastic properties via a 'loop and train' mechanism. Genetic engineering can be used to manipulate the amount and composition of the HMM subunits, leading to either increased dough strength or to more drastic changes in gluten structure and properties.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
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