Annex I: RP954 - Endo-1,4-beta-xylanase produced by Trichoderma reesei as a feed additive for piglets (weaned), chickens for fattening, chickens reared for laying, turkeys for fattening and turkeys reared for breeding

Background 

Name of applicant:

Roal Oy

Address of applicant:

Tykkimäentie 15b
05200
Rajamäki
Finland

FSA/FSS Safety Assessment 

FSA/FSS has undertaken a safety assessment of application RP954 for the renewal of use of endo-1,4-beta-xylanase (EC 3.2.1.8) produced by Trichoderma reesei (CBS 114044) (Econase® XT) as a feed additive for piglets (weaned), chickens for fattening, chickens reared for laying, turkeys for fattening and turkeys reared for breeding, from Roal Oy.

FSA/FSS has reviewed the EFSA opinions (EFSA Journal 2021;19(2):6458 and EFSA Journal 2019;17(11):5880) and confirms that it is adequate for UK considerations and, therefore, a full safety assessment of this application was not performed. Please see the earlier section titled ‘Our safety assessment process’ to understand how and when we make use of EFSA opinions.

The FSA/FSS opinion is that endo-1,4-beta-xylanase (EC 3.2.1.8) (Econase® XT), as described in this application, is safe and is not liable to have an adverse effect on the target species, worker safety, environmental safety and human health at the intended concentrations of use. The proposed terms of authorisation are set out below.

Any relevant provisions of retained EU law

Under the requirements of the Regulation for feed additives:

1. Article 16 and points 1(a) and 1(b) of Annex III: Labelling and packaging requirements apply, if authorised. 
2. Article 21: Analytical methods have been verified by the European Reference Laboratory as used for the control of endo-1,4-beta-xylanase produced by Trichoderma reesei (CBS 114044) (Econase® XT) in animal feed as detailed in the EURL analytical method evaluation report (FAD-2018-0071). Valid analytical methods exist for:

• the quantification of endo-1,4-beta-xylanase in the feed additive, premixtures, feed materials and compound feed

    3. Annex IV: The general conditions of use must be complied with, where applicable for the individual feed additive authorisation. 

Proposed terms of authorisation

1: Additive details

2: Additive composition 

Preparation of endo-1,4-beta-xylanase (EC 3.2.1.8) produced by fermentation with Trichoderma reesei (CBS 114044) having a minimum activity of 1.6 x 105 BXU/g for both solid and liquid forms:

*[Enzyme activity expressed in birchwood xylanase units (BXU), where one BXU is the amount of enzyme which liberates 1 nanomole of reducing sugars as xylose from birch xylan per second at pH 5.3, and 50°C.

3: Characterisation / identification of the active substance(s)

Endo-1,4-beta-xylanase produced by fermentation of Trichoderma reesei (CBS 114044)

• EC (IUBMB) number: 3.2.1.8
• EINECS number: 232-800-2
• CAS number: 9025-57-4

4: Conditions of use

 5: Other Provisions

1. In the directions for use of the additive and premixtures, the storage conditions and stability to heat treatment shall be indicated. 

6: Analytical methods

For the quantification of endo-1,4-beta-xylanase in the feed additive and premixtures: 
Colorimetric method based the enzymatic reaction of endo-1,4-beta-xylanase on the birch xylan substrate at pH 5.3 and 50°C.

For the quantification of endo-1,4-beta-xylanase in feed materials and compound feed:
Colorimetric method based the enzymatic reaction of endo-1,4-beta-xylanase on the azurine cross-linked wheat arabinoxylan substrate at pH 5.3 and 50°C.

Other relevant information (separate to terms of authorisation)

1: Supplementary information

• feed additives are subject to UK health and safety legislation. The safety assessment identified that particular consideration should be given to hazards as a: respiratory sensitiser.
• for use in feed for piglets (weaned) up to 35 kg body weight.
• Major animal species and their subgroups are defined in Annex IV of Retained EU Regulation 429/2008.
• the FSA/FSS consider there is no basis to propose specific requirements for a post-market monitoring plan other than those established in Retained EU Regulation 183/2005 ‘Feed Hygiene Regulation’ and Good Manufacturing Practice.

2: Recommendations

For use in compound feed rich in non-starch polysaccharides, mainly arabinoxylans (e.g., containing more than 20% wheat).