Evidence map›Paper›PMID 36224448›Full record

ArticleAMB Express2022

DAR-PCR: a new tool for efficient retrieval of unknown flanking genomic DNA.

Tianyi Sun, Mengya Jia, Lingqin Wang, Zhaoqin Li, Zhiyu Lin, Cheng Wei, Jinfeng Pei, Haixing Li

Open access · goldAbstract read
In one paragraph

Article in AMB Express, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
3.4field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

14 citing papers in PubMed, 18 citations in OpenAlex.

  1. Article
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  4. Uracil walking primer PCR: An accurate and efficient genome-walking tool.Journal, genetic engineering & biotechnology · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 2 countries.

Tianyi SunKey Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Environmental and Chemical Engineering, Nanchang University, 330031, Nanchang, PR China.
Mengya JiaState Key Laboratory of Food Science and Technology, Nanchang University, 330047, Nanchang, PR China.
Lingqin WangState Key Laboratory of Food Science and Technology, Nanchang University, 330047, Nanchang, PR China.
Zhaoqin LiCharles W. Davidson College of Engineering, San Jose State University, 95192, San Jose, CA, USA.
Zhiyu LinKey Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Environmental and Chemical Engineering, Nanchang University, 330031, Nanchang, PR China.
Cheng WeiState Key Laboratory of Food Science and Technology, Nanchang University, 330047, Nanchang, PR China.
Jinfeng PeiState Key Laboratory of Food Science and Technology, Nanchang University, 330047, Nanchang, PR China.
Haixing LiState Key Laboratory of Food Science and Technology, Nanchang University, 330047, Nanchang, PR China. hxli@ncu.edu.cn.
Nanchang University · CNDavidson College · USState Key Laboratory of Food Science and Technology · CN

Funding

National Natural Science Foundation of China 31570070National Natural Science Foundation of China 32160014
6 · The paper itself

Abstract

Various PCR-based genome-walking methods have been developed to acquire unknown flanking DNA sequences. However, the specificity and efficacy levels, and the operational processes, of the available methods are unsatisfactory. This work proposes a novel walking approach, termed differential annealing-mediated racket PCR (DAR-PCR). The key to DAR-PCR is the use of primer-mediated intra-strand annealing (ISA). An ISA primer consists of a 5' root homologous to the known sequence and a heterologous 3' bud. In the single low-stringency cycle, the ISA primer anneals to a site on an unknown region and extends towards the sequence-specific primer (SSP) 1 site, thereby forming a target single-stranded DNA bound by the SSP1 complement and the ISA primer. In the subsequent more stringent cycles, its complementary strand is accumulated, owing to the differential annealing between the moderate-stringency ISA primer and the high-stringency SSP1. The accumulation of this strand provides an opportunity for ISA mediated by the ISA primer root. A loop-back extension subsequent to ISA occurs, creating a racket-like DNA with the known region positioned at both ends of the unknown sequence. This DNA is exponentially amplified during the secondary PCR driven by an SSP pair inner to SSP1. DAR-PCR was validated as an efficient walking method by determining unknown flanking sequences in Lactobacillus brevis and Oryza sativa.

Indexed as

Differential annealingGenome walkingIntra-strand annealingPrimer budPrimer rootRacket-like DNA

Identifiers

PMID36224448
PMCPMC9556680
OpenAlexW4304734198

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.