[Mycology] Re: Contents of Mycology Digest, Vol 18, Issue 3

[geis.pa At pg.com]

Suggest the answer is more complex than merely the reported amino acids 
composition of "mycoprotein" - assume basidiocarps.  There are glowing 
reports of the vlaue of fungi in this context* but some reports found 
limitations in methionine and phenylalanine and others, considering 
composition and digestibility, have concluded  "... mushroom types studied are of low protein quality." *  - the mushroom 
types being Terfezia claveryi, Pleurotus ostreatus, Tricholoma terrum and Agaricus 
macrosporus
Careful reading  of many of these reports (for example, often finds a 
common flaw - the presumption that all nitrogen is attributable to 
protein.  Often derived from total N by Kjedahl - this ignores the 
substnatial controbution to total fungal N by chitin (polymer of 
N-acetylglucosamine).  So total protein is often substantially 
overestimated.


* Pleurotus mushrooms. Part II. Chemical composition, nutritional value, 
post-harvest physiology, preservation, and role as human food.Crit Rev Food Sci Nutr. 1988;27(2):87-158 
** Protein digestibility using corrected amino acid score method (PDCAAS) of 
four types of mushrooms grown in Jordan.  Plant Foods Hum Nutr. 2002 
57:13-24. ***On the Chemical Composition and Nutritional Value of Pleurotus Taxa Growing on Umbelliferous Plants (Apiaceae) . Agric. Food Chem., 53 (15), 5997 -6002, 2005




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   1. Re: Mycoprotein, is it a complete protein? (dwheeler At ipns.com)


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Message: 1
Date: 6 Dec 2006 23:04:48 -0800
From: "dwheeler At ipns.com" <dwheeler At ipns.com>
Subject: [Mycology] Re: Mycoprotein, is it a complete protein?
To: bionet-mycology At moderators.isc.org
Message-ID: <1165475088.192925.134010 At 79g2000cws.googlegroups.com>
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Erik Saunders wrote:
> Hi
>
> Is Mycoprotein a complete protein?
>
> Thank you
> Erik
If you are talking about protein found in fungi, then the answer is
nearly yes. Many fungi contain all basic amino acids necessary for
human life with the exception of lysine. Lysine is commonly found in
whole grains.

Daniel B. Wheeler



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