JP2020509769A - 熱処理による還元糖の異性化を抑制する方法 - Google Patents
熱処理による還元糖の異性化を抑制する方法 Download PDFInfo
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- JP2020509769A JP2020509769A JP2019550677A JP2019550677A JP2020509769A JP 2020509769 A JP2020509769 A JP 2020509769A JP 2019550677 A JP2019550677 A JP 2019550677A JP 2019550677 A JP2019550677 A JP 2019550677A JP 2020509769 A JP2020509769 A JP 2020509769A
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- Prior art keywords
- lacto
- acid
- aqueous solution
- bioproduct
- heat
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Abstract
Description
−少なくとも1つの精製酵素を準備するステップ;
−少なくとも1つの精製酵素を、熱処理の前及び/又は熱処理の過程で先に本明細書に記載されたように酸性化された、熱処理された糖水溶液の存在下で1つ以上の抽出物と接触させて、1つ以上の抽出物を所望のバイオ製品に変換するステップ;及び
−任意に、バイオ製品を精製するステップ
を含む。
−バイオ製品を産生することができる細胞を準備するステップ;
−少なくとも1つの細胞がバイオ製品を産生するために、少なくとも1つの細胞を、少なくとも1つの還元糖を含有する熱処理された水溶液を含有する、及び/又は補充された発酵ブロス中で培養するステップ;及び
−任意選択的に発酵ブロスからバイオ製品を精製するステップ
を含む。
0.66Mラクトース溶液を、226gのラクトースを水に溶解することによって調製した。溶液の最終容量は1リットルであった。30℃〜35℃の温度で、50%(w/v)クエン酸又は99%(v/v)酢酸を用いてpHを調整した。その後、溶液を垂直オートクレーブ(Systec VX−65、ドイツ、リンデン)中、121℃で20分間滅菌した。加熱滅菌の前後に試料を採取し、高速液体クロマトグラフィー(HPLC)による分析の前に凍結保存した。HPLCは、RID−10A屈折率検出器(Shimadzu、ドイツ)及びShimadzu HPLCシステムに接続したWaters XBridge Amide Column 3.5μm(250×4.6mm)(Eschborn、ドイツ)を用いて実施した。30%溶媒A(二重蒸留水中の50%(v/v)アセトニトリル、0.1%(v/v)NH4OH)及び70%溶媒B(二重蒸留水中の80%(v/v)アセトニトリル、0.1%(v/v)NH4OH)を35℃及び流速1.4mL/分で定組成溶離を行った。イオン交換マトリックス(Strata ABW、Phenomenex)上で固相抽出により試料を洗浄した。10マイクロリットルの試料(1:5の希釈)をカラムに施した。最後に、検出された糖の相対量を測定した。表1及び2に示すように、加熱滅菌により誘導されたラクトース異性化は、熱処理前の溶液のpH値が減少するにつれて減少した。クエン酸又は酢酸でそれぞれ酸性化を行った場合、pH4.0〜3.0又はpH3.0ではラクツロース形成は観察されなかった。酸触媒によるラクトースの単糖への分解はより低いpH値で増加したが、pH4.5では検出できなかった。
0.66Mラクトース溶液を、226gのラクトースを水に溶解することによって調製した。溶液の最終容量は1リットルであった。30℃〜35℃の温度で、37%(v/v)塩酸、50%(v/v)リン酸又は96%(v/v)硫酸を用いてpHを調整した。その後、溶液を垂直オートクレーブ(Systec VX−65、ドイツ、リンデン)中、121℃で20分間滅菌した。加熱滅菌の前後に試料を採取し、高速液体クロマトグラフィー(HPLC)による分析の前に凍結保存した。HPLCは、RID−10A屈折率検出器(Shimadzu、ドイツ)及びShimadzu HPLCシステムに接続したWaters XBridge Amide Column 3.5μm(250×4.6mm)(Eschborn、ドイツ)を用いて実施した。30%溶媒A(二重蒸留水中の50%(v/v)アセトニトリル、0.1%(v/v)NH4OH)及び70%溶媒B(二重蒸留水中の80%(v/v)アセトニトリル、0.1%(v/v)NH4OH)を35℃及び流速1.4mL/分で定組成溶離を行った。イオン交換マトリックス(Strata ABW、Phenomenex)上で固相抽出により試料を洗浄した。10マイクロリットルの試料(1:5の希釈)をカラムに施した。最後に、検出された糖の相対量を測定した。表3、4及び5に示すように、加熱滅菌により誘導されたラクトース異性化は、熱処理前の溶液の酸性化の増加の結果として減少した。pH3.5〜3.0ではラクツロースの形成は観察されなかった。対照的に、リン酸及び硫酸又は塩酸をそれぞれ酸性化に使用した場合、酸触媒によるラクトースの単糖への分解は、より低いpH値では増加したが、pH値4.5〜4.0又はpH5.0〜4.0では、分解が存在しなかった。
欧州特許出願第16196486に従って、GDP−フコース(ManB、ManC、Gmd、WcaG)、バクテロイデス・フラジリス(Bacteroides fragilis)の二機能性L−フコキナーゼ/L−フコース1−ホスファトグアニルトランスフェラーゼ、大腸菌O126の2−フコシルトランスフェラーゼ遺伝子wbgL、ラクトースパーミアーゼ遺伝子lacY、エルシニア・ベルコビエリ(Yersinia bercovieri)ATCC 43970の糖排出トランスポーターyberc0001_9420、フルクトース−1,6−ビスホスフェートアルドラーゼ(fbaB)及びプスム・サティブム(Pisum sativum)からの非相同フルクトース−1,6−ビスホスフェートホスファターゼ(fbpase)の新規合成のための酵素を過剰発現する操作された大腸菌BL21(DE3) ΔnagAb ΔwcaJ ΔfucIK ΔpfkA株を用いた。
Claims (18)
- 糖水溶液の熱処理の際、還元糖を含有する前記水溶液中の還元糖の異性化を抑制する方法であって、該糖水溶液を該熱処理前及び/又は過程で酸性化するステップを含む方法。
- 前記糖水溶液が、約1〜約6の値を有するpHに、好ましくは約2〜約5の値を有するpHに、より好ましくは約3〜約4の値を有するpHに酸性化される、請求項1に記載の方法。
- 前記糖水溶液に少なくとも1つの酸を添加することによって、前記糖水溶液を酸性化する、請求項1又は2に記載の方法。
- 前記酸が、好ましくは塩酸、硫酸、亜硫酸、リン酸、ホウ酸、フッ化水素酸、臭化水素酸、過塩素酸、ヨウ化水素酸及び炭酸からなる群から選択される無機酸である、請求項3に記載の方法。
- 前記酸が、好ましくはモノカルボン酸、ジカルボン酸、及びトリカルボン酸からなる群から選択される有機酸である、請求項3に記載の方法。
- 前記還元糖が、アルドース、二糖及びオリゴ糖からなる群から選択され、好ましくは、ラクトース及びマルトースからなる群から選択される二糖である、請求項1〜5のいずれか一項に記載の方法。
- 前記熱処理が、酸性化された前記水溶液を約30℃〜約150℃の範囲の温度に曝すことを含む、請求項1〜6のいずれか一項に記載の方法。
- 少なくとも1つの還元糖を含有する熱処理された水溶液であって、該水溶液が、請求項1〜7のいずれか一項に記載の方法によって得られる、熱処理された水溶液。
- 前記水溶液が滅菌されている、請求項8に記載の熱処理された水溶液。
- 前記還元糖がラクトースであり、好ましくは≧10mMの濃度で、好ましくは≧100mMの濃度で、より好ましくは≧0.66Mの濃度で、最も好ましくは≧1Mの濃度で存在する、請求項8又は9に記載の熱処理された水溶液。
- バイオ製品を製造するためのバイオテクノロジー生産方法における、請求項8〜10のいずれか一項に記載の少なくとも1つの還元糖を含有する熱処理された水溶液の使用。
- 前記バイオテクノロジー方法が、生体触媒生産方法及び発酵生産方法からなる群から選択される、請求項11に記載の使用。
- 少なくとも1つの還元糖を含有する熱処理された水溶液が、ラクトースを含有する湿式加熱滅菌水溶液である、ヒト乳オリゴ糖の発酵生産のための請求項12に記載の使用。
- バイオ製品のバイオテクノロジー生産方法であって、以下のステップ、すなわち、
−バイオ製品を産生することができる少なくとも1つの細胞を準備するステップ;
−該少なくとも1つの細胞が該バイオ製品を産生するために、請求項8〜10のいずれか一項に記載の熱処理された水溶液を含有する、及び/又は該水溶液を補充された発酵ブロス中で該少なくとも1つの細胞を培養するステップ;及び
−任意選択的に該発酵ブロスから該バイオ製品を精製するステップ
を含む方法。 - 前記バイオ製品がヒト乳オリゴ糖であり、前記熱処理された水溶液がラクトースを含有する湿式加熱滅菌水溶液である、請求項14に記載の方法。
- 前記バイオ製品が、前記発酵方法の終了時に前記発酵ブロス中で≧100g/Lの量、好ましくは前記発酵ブロス中で≧150g/Lの量、より好ましくは前記発酵ブロス中で≧200g/Lの量で生産される、請求項14又は15に記載の方法。
- 前記バイオ製品が、好ましくはヒト乳オリゴ糖、ラクトスクロース及びラクトビオン酸からなる群から選択される、請求項14又は15に記載の方法により製造されるバイオ製品。
- バイオ製品が、2’−フコシルラクトース、3−フコシルラクトース、2’,3−ジフコシルラクトース、ラクト−N−トリオースII、ラクト−N−テトラオース、ラクト−N−ネオテトラオース、ラクト−N−フコペンタオースI、ラクト−N−ネオフコペンタオースI、ラクト−N−フコペンタオースII、ラクト−N−フコペンタオースIII、ラクト−N−フコペンタオースV、ラクト−NネオフロペンタオースV、ラクト−N−ジフコヘキサオースI、ラクト−N−ジフコヘキサオースII、パラ−ラクト−N−フコシルヘキサオース、フコシル−ラクト−N−シアリルペンタオースb、フコシル−ラクト−N−シアリルペンタオースc、フコシル−ラクト−N−シアリルペンタオースc、ジシアリル−ラクト−N−フコペンタオース、3−フコシル−3’−シアリルラクトース、−3−フコシル−6’−シアリルラクトース、ラクト−N−ネオジフコヘキサオースI、3’−シアリルラクトース、6’−シアリルラクトース、シアリルラクト−N−テトラオースLST−a、LST−b、LST−c及びジシアリルラクト−N−テトラオースからなる群から選択されるヒト乳オリゴ糖である、請求項11〜13のいずれか一項に記載の使用、請求項14〜16のいずれか一項に記載の方法又は請求項17に記載のバイオ製品。
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JP7186175B2 (ja) | 2022-12-08 |
ES2928859T3 (es) | 2022-11-23 |
WO2018167293A1 (en) | 2018-09-20 |
DK3375291T3 (da) | 2022-10-31 |
MX2019010872A (es) | 2019-12-11 |
BR112019017840A8 (pt) | 2023-04-18 |
KR102689435B1 (ko) | 2024-07-30 |
EP3375291A1 (en) | 2018-09-19 |
EP3595455A1 (en) | 2020-01-22 |
CN110418577A (zh) | 2019-11-05 |
KR20190130125A (ko) | 2019-11-21 |
US20200087690A1 (en) | 2020-03-19 |
AU2018235156A1 (en) | 2019-08-15 |
SG11201906991PA (en) | 2019-09-27 |
AU2018235156B2 (en) | 2023-04-27 |
EP3375291B1 (en) | 2022-08-10 |
PH12019550151A1 (en) | 2020-06-08 |
RU2019131462A (ru) | 2021-04-19 |
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