CN114057893A - 一种编码线粒体定位的豆蔻酰化多肽及其制备方法与应用 - Google Patents

一种编码线粒体定位的豆蔻酰化多肽及其制备方法与应用 Download PDF

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CN114057893A
CN114057893A CN202111307669.1A CN202111307669A CN114057893A CN 114057893 A CN114057893 A CN 114057893A CN 202111307669 A CN202111307669 A CN 202111307669A CN 114057893 A CN114057893 A CN 114057893A
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周亮
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Abstract

本发明提供了一种编码线粒体定位豆蔻酰化的多肽及其制备方法与应用,属于分子遗传学技术领域。本发明所述多肽序列具有如M‑N式表示的氨基酸序列,其中,M为SEQ ID No.1所示的氨基酸序列以及N为SEQ ID No.2所示的氨基酸序列。本发明包括序列如SEQ ID No.3所述的多肽、多肽组合物、核酸、多肽偶联物在表达豆蔻酰化线粒体定位蛋白中的应用。本发明所述的序列的氨基末端带有豆蔻酰化保守序列,能够被豆蔻酰化,进而***在线粒体细胞膜中。

Description

一种编码线粒体定位的豆蔻酰化多肽及其制备方法与应用
技术领域
本发明涉及分子遗传学技术领域,尤其是指一种编码线粒体定位的豆蔻酰化多肽及其制备方法与应用。
背景技术
本发明属于分子遗传学领域。线粒体功能研究依赖于线粒体共定位的标记基因和相关荧光染料。但是,如何将脂肪酸修饰的目的蛋白人为导入线粒体,是目前研究的难点。
观察和研究线粒体功能,依赖于线粒体定位的标记基因和荧光染料。同时,将目的基因和线粒体导肽融合,能够将目的基因编码的目的蛋白导入线粒体。这些方法使得研究线粒体功能变得简单和直接。
脂肪酸修饰的目的蛋白(即豆蔻酰化)导入线粒体,是目前相关技术的难点。现有的线粒体导肽,不能将脂肪酸修饰的外源蛋白导入线粒体。
发明内容
为解决上述技术问题,本发明提供了一种编码线粒体定位的豆蔻酰化的多肽及其制备方法。
一种编码线粒体定位的豆蔻酰化的多肽,所述多肽序列具有如M-N式表示的氨基酸序列,且所述氨基酸序列的氨基末端进行了豆蔻酰化,其中, M为SEQ ID No.1所示的氨基酸序列以及N为SEQ ID No.2所示的氨基酸序列,或具有与所述M-N式表示的氨基酸序列具有至少70%同源性的氨基酸序列。
进一步的,所述多肽的氨基酸序列如SEQ ID No.3所示。
一种多肽组合物,所述多肽组合物包括所述氨基酸序列如SEQ ID No.3 所示的多肽。
一种核酸,所述核酸含有氨基酸序列如SEQ ID No.3所示的多肽的编码序列。
一种多肽偶联物,所述多肽偶联物包括多肽部分,其中多肽部分含有所述的多肽。
进一步的,所述多肽偶联物还包括偶联部分,所述偶联部分与所述多肽部分连接。
进一步的,所述偶联部分选自血蓝蛋白、卵清蛋白及牛血清白蛋白中的至少一种。
所述的多肽、所述的多肽组合物、所述的核酸、所述多肽偶联物在制备用于靶向定位亚细胞器荧光成像的荧光探针中的应用。
所述的多肽、所述的多肽组合物、所述的核酸、所述多肽偶联物在表达线粒体定位蛋白中的应用。
进一步的,所述亚细胞器包括线粒体。
本发明的上述技术方案相比现有技术具有以下优点:
本发明所述的序列的氨基末端带有豆蔻酰化保守序列,能够被豆蔻酰化,进而***在线粒体细胞膜中。同时本发明序列羧基末端的序列,来源于 NMDA受体GluN1亚基的C0区域,C0区域能够结合Calmodulin,进而促进和线粒体的结合。可见,本发明中得到的序列可以靶向定位线粒体。
附图说明
为了使本发明的内容更容易被清楚的理解,下面根据本发明的具体实施例并结合附图,对本发明作进一步详细的说明,其中。
图1是本发明实施例2中豆蔻酰化线粒体定位多肽序列的定位表达荧光图;
图2是本发明实施例3豆蔻酰化线粒体定位的GFP融合质粒 (myr-mito-GFP)与商业化的线粒体定位质粒(Mito-RFP)的荧光图。
具体实施方式
下面结合附图和具体实施例对本发明作进一步说明,以使本领域的技术人员可以更好地理解本发明并能予以实施,但所举实施例不作为对本发明的限定。
实施例1
豆蔻酰化线粒体定位多肽序列筛选和确认:
(1)豆蔻酰化保守序列来源于蛋白MARCKS前端序列:MGAQFSK。
其对应的核苷酸为:ATGGGTGCCCAGTTCTCCAAG。
(2)定制带有豆蔻酰化保守序列的GluN1 C0区域的PCR引物,其序列如下:
GluN1:5’-3’(带有豆蔻酰化保守序列):TCGGCTAGCACCATG GGTGCCCAGTTCTCCAAGATCGCCTACAAGCGACACAAGGATGCC; 3’-5’:AGCTGTCGACCTGCAGGTTCTTCCTCCACACGTTCAC。
(3)GluN1质粒作为模板,进行常规PCR。(PCR试剂盒购于宝生物技术(TaKaRa)有限公司)体系。PCR体系(25μL)如下(单位:μL):
10×Buffer:2.5,
dNTP:2,
Taq:0.5;
primer:2;
vector:300ng。
(4)进行PCR,其中PCR的条件如下:
(4.1)一个循环,95℃30秒;
(4.2)30个循环,95℃30秒,58℃30秒,72℃2分钟;
(4.3)一个循环,72℃10分钟。
(5)进行琼脂糖凝胶电泳,核酸胶回收后使用NEB快切酶Nhe I和 Sal I酶切20分钟。核酸胶回收酶切后的产物。
(6)NEB快切酶Nhe I和Sal I酶切pEGFP-N3载体1-3小时,经过核酸胶回收酶切后的载体。
(7)利用宝生物技术(TaKaRa)有限公司连接酶Solution I,在16度条件下,连接1-2小时(具体方法见产品说明)。
(8)连接产物加入感受态细胞DH5α(全式金生物)中,先在冰上孵育20分钟,接着42度热激1分钟,最后在冰上放置2-5分钟,涂板后挑菌测序正确。
实施例2
豆蔻酰化线粒体定位多肽序列(myr-mito)的表达:
首先将HEK293细胞接种于24孔板中,接着在24小时后,利用lipo2000 转染试剂以每孔300ng的质粒量将豆蔻酰化线粒体定位序列(myr-mito)的 GFP融合质粒转染进HEK293细胞,转染24小时后荧光显微镜观察其定位 (比例尺:20微米)。可以看出,本发明中带有豆蔻酰化线粒体定位序列能够在HEK293细胞中表达,并且呈现出线粒体定位。
实施例3
豆蔻酰化线粒体定位多肽序列(myr-mito)的定位:
首先将HEK293细胞接种于24孔板中,接着在24小时后,利用lipo2000 转染试剂以每孔300ng的质粒量将豆蔻酰化线粒体定位序列(myr-mito)的 GFP融合质粒和商业化的线粒体定位质粒(Mito-RFP)或内质网定位质粒(ER-RFP)转染进HEK293细胞,转染24小时后荧光显微镜观察其定位(比例尺:20微米)。可以看出,本发明中带有豆蔻酰化线粒体定位序列能够地定位在线粒体,而不是内质网。
SEQ ID No.1:Met GlyAla Gln Phe Ser Lys;
SEQ ID No.2:Ile Ala Tyr Lys Arg His Lys Asp Ala Arg Arg Lys Gln MetGln LeuAla PheAlaAlaValAsnVal TrpArg Lys Asn Leu Gln;
SEQ ID No.3:Met Gly Ala Gln Phe Ser Lys Ile Ala Tyr Lys Arg His LysAsp AlaArgArg Lys Gln Met Gln LeuAla Phe AlaAla Val Asn Val Trp Arg Lys AsnLeu Gln。
显然,上述实施例仅仅是为清楚地说明所作的举例,并非对实施方式的限定。对于所属领域的普通技术人员来说,在上述说明的基础上还可以做出其它不同形式变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引申出的显而易见的变化或变动仍处于本发明创造的保护范围之中。
SEQUENCE LISTING
<110> 苏州大学
<120> 一种编码线粒体定位的豆蔻酰化的多肽及其制备方法与应用
<130> 3
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<170> PatentIn version 3.3
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Met Gly Ala Gln Phe Ser Lys
1 5
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<212> PRT
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Ile Ala Tyr Lys Arg His Lys Asp Ala Arg Arg Lys Gln Met Gln Leu
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Ala Phe Ala Ala Val Asn Val Trp Arg Lys Asn Leu Gln
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<212> PRT
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Met Gly Ala Gln Phe Ser Lys Ile Ala Tyr Lys Arg His Lys Asp Ala
1 5 10 15
Arg Arg Lys Gln Met Gln Leu Ala Phe Ala Ala Val Asn Val Trp Arg
20 25 30
Lys Asn Leu Gln
35

Claims (10)

1.一种编码线粒体定位豆蔻酰化的多肽,其特征在于:所述多肽序列具有如M-N式表示的氨基酸序列,且所述氨基酸序列的氨基末端进行了豆蔻酰化,其中,M为SEQ ID No.1所示的氨基酸序列以及N为SEQ ID No.2所示的氨基酸序列,或具有与所述M-N式表示的氨基酸序列具有至少70%同源性的氨基酸序列。
2.根据权利要求1所述的编码线粒体定位的豆蔻酰化多肽,其特征在于:所述多肽的氨基酸序列如SEQ ID No.3所示。
3.一种多肽组合物,其特征在于:所述多肽组合物包括权利要求2中所述氨基酸序列如SEQ ID No.3所示的多肽。
4.一种核酸,其特征在于:所述核酸含有氨基酸序列如SEQ ID No.3所示的多肽的编码序列。
5.一种多肽偶联物,其特征在于:所述多肽偶联物包括多肽部分,其中多肽部分含有权利要求1-2任一项所述的多肽。
6.根据权利要求5所述的多肽偶联物,其特征在于:所述多肽偶联物还包括偶联部分,所述偶联部分与所述多肽部分连接。
7.根据权利要求6所述的多肽偶联物,其特征在于:所述偶联部分选自血蓝蛋白、卵清蛋白及牛血清白蛋白中的至少一种。
8.权利要求1-2任一项所述的多肽、权利要求3所述的多肽组合物、权利要求4所述的核酸、权利要求5-7任一项所述多肽偶联物在制备用于靶向定位亚细胞器荧光成像的荧光探针中的应用。
9.权利要求1-2任一项所述的多肽、权利要求3所述的多肽组合物、权利要求4所述的核酸、权利要求5-7任一项所述多肽偶联物在表达线粒体定位蛋白中的应用。
10.根据权利要求8所述的应用,其特征在于:所述亚细胞器包括线粒体。
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998040477A1 (en) * 1997-03-14 1998-09-17 The Regents Of The University Of California Fluorescent protein sensors for detection of analytes
CN107446027A (zh) * 2017-09-05 2017-12-08 苏州大学 具有核定位能力的透皮短肽及其应用
US20180126003A1 (en) * 2016-05-04 2018-05-10 Curevac Ag New targets for rna therapeutics
CN109575116A (zh) * 2018-11-09 2019-04-05 广东海洋大学 一种线粒体定位导肽及其发现方法与应用
WO2020101740A1 (en) * 2018-11-16 2020-05-22 Codiak Biosciences, Inc. Engineered extracellular vesicles and uses thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998040477A1 (en) * 1997-03-14 1998-09-17 The Regents Of The University Of California Fluorescent protein sensors for detection of analytes
US20180126003A1 (en) * 2016-05-04 2018-05-10 Curevac Ag New targets for rna therapeutics
CN107446027A (zh) * 2017-09-05 2017-12-08 苏州大学 具有核定位能力的透皮短肽及其应用
CN109575116A (zh) * 2018-11-09 2019-04-05 广东海洋大学 一种线粒体定位导肽及其发现方法与应用
WO2020101740A1 (en) * 2018-11-16 2020-05-22 Codiak Biosciences, Inc. Engineered extracellular vesicles and uses thereof

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