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Probe for identifying bacteria, identification method and application thereof

A technology for bacteria and probes, applied in biochemical equipment and methods, microbial determination/inspection, DNA/RNA fragments, etc. Simple, low professional requirements, low price effect

Active Publication Date: 2020-08-04
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN105460922A discloses a partially reduced graphene oxide fluorescence resonance energy transfer nanoprobe and a preparation method thereof. Partially reduced graphene oxide is prepared by room temperature controlled reduction of graphene oxide in an alkaline solution, which is environmentally friendly and has good reproducibility. But the process is complex and time-consuming
CN106086173A discloses a rapid bacterial detection method based on upconversion fluorescence resonance energy transfer, in which the nucleic acid aptamer that can specifically recognize target bacteria is modified on the surface of gold nanoparticles, and the surface modification of rare earth upconversion fluorescent particles is complementary to the aptamer cDNA, resulting in fluorescence quenching, high sensitivity and good specificity, but the operation process requires professional operation, the detection of a single strain, narrow scope of application

Method used

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  • Probe for identifying bacteria, identification method and application thereof
  • Probe for identifying bacteria, identification method and application thereof
  • Probe for identifying bacteria, identification method and application thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0072] The assembly of embodiment 1 kit

[0073] Thirty-two fluorophore-labeled DNA probes were assembled into a kit with a single-layer graphene oxide nanosheet solution at a concentration of 1 mg / mL, phosphate buffer, TE buffer solution, and conventional reagents;

[0074] The sequence of the DNA probe is as follows:

[0075] SEQ ID No.1 is CCCCCCCCCCCCCCC, named P0;

[0076] SEQ ID No.2 is CCCCCCCCCCCCTTT, named as P1;

[0077] SEQ ID No.3 is CCCCCCCCCTTTCCC, named P2;

[0078] SEQ ID No.4 is CCCCCCCCCTTTTTT, named as P3;

[0079] SEQ ID No.5 is CCCCCCTTTTCCCCCC, named P4;

[0080] SEQ ID No.6 is CCCCCCTTTTCCCTTT, named as P5;

[0081] SEQ ID No.7 is CCCCCCTTTTTTCCC, named P6;

[0082] SEQ ID No.8 is CCCCCCTTTTTTTTT, named as P7;

[0083] SEQ ID No.9 is CCCTTTTCCCCCCCCC, named P8;

[0084] SEQ ID No.10 is CCCTTTCCCCCCTTT, named as P9;

[0085] SEQ ID No.11 is CCCTTTCCCTTTCCC, named as P10;

[0086] SEQ ID No.12 is CCCTTTCCCTTTTTTT, named as P11;

[0087] SEQ ID N...

Embodiment 2

[0108] 1. Randomly select eight fluorophore-labeled DNA probes from 32 probes. The fluorophore-labeled position is at the 5' end. The sequence is as follows:

[0109] The SEQ ID No.1: FAM-CCCCCCCCCCCCCCCC is named as P0.

[0110] Said SEQ ID No.5: FAM-CCCCCCTTTTCCCCCC is named as P4.

[0111] The SEQ ID No.11: FAM-CCCTTTCCCTTTTCCC is named as P10.

[0112] Said SEQ ID No.15: FAM-CCCTTTTTTTTTTCCC is named as P14.

[0113] The SEQ ID No.18: FAM-TTTCCCCCCCCCTTTT is named as P17.

[0114] Said SEQ ID No.22: FAM-TTTCCCTTTTCCCTTT is named as P21.

[0115] Said SEQ ID No.28: FAM-TTTTTTCCCTTTTT, named as P27.

[0116] The SEQ ID No.32: FAM-TTTTTTTTTTTTTTTT is named as P31.

[0117] 2. An aqueous solution of single-layer graphene oxide nanosheets with a concentration of 1 mg / mL;

[0118] 3. Nine bacterial suspensions with a McFarland turbidity of 4, as follows:

[0119] 1. Staphylococcus aureus ATCC 25923; 2. Streptococcus faecalis ATCC 29212;

[0120] 3. Pseudomonas aeruginosa...

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Abstract

The invention provides probes and method to identify bacteria and application of the probe. Nucleotide sequences of the probes are shown as SEQ ID NO. 1-32. The 32 specific DNA fluorescent probes aredesigned ingeniously; graphene oxide nanosheet is used to carry out fluorescence quenching; mode recognition software is used to perform data processing; reaction conditions and steps are optimized; abacteria identifying system is finally established. The steps and conditions are of good synergy. The method herein is simple and quick to perform, has improved identifying efficiency and accuracy, and has a promising application prospect and good market value.

Description

technical field [0001] The invention relates to the technical field, in particular to a probe for identifying bacteria and its identification method and application. Background technique [0002] Bacterial identification is of great importance in medicine and industry. In medicine, to cure a patient infected by bacteria, doctors need to first know what kind of bacteria the patient is infected with and what kind of antibiotics the bacteria is sensitive to, so that they can choose the right drug to kill it. In industry, many products must be tested for bacteria before they can be sold, and this is especially strict in the food industry. Currently, commonly used bacterial identification methods have many limitations, such as long incubation time, professional experimenters, and expensive instruments. [0003] Graphene nanosheets are a material composed of single-layer atomic plane structure graphene stacks, which have unique quantum effects, excellent dispersion properties in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12Q1/689C12Q1/14C12Q1/10C12Q1/04C12N15/11
CPCC12Q1/689
Inventor 刘刚王乐乐李妍闻艳丽罗超梁文许丽李兰英
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH