Repetitive element annotation protocol for the eastern banjo frog

Qiye Li, Qunfei Guo, Yang Zhou, Huishuang Tan, Terry Bertozzi, Yuanzhen Zhu, Ji Li, Stephen Donnellan, Guojie Zhang

Published: 2023-02-27 DOI: 10.17504/protocols.io.bc4niyve

Abstract

This pipeline is the repetitive element annotation by using homology-based, de novo predictions and Tandem Repeats Finder to identify repetitive elements in the Limnodynastes dumerilii dumerilii genome assembly.

Steps

1.

The following sub-steps are the process for homology-based predictions to identify repetitive elements in the Limnodynastes dumerilii dumerilii genome assembly. Limnodynastes dumerilii dumerilii genome assembly.

1.1.

Identify known repetitive elements by aligning the Limnodynastes dumerilii dumerilii genome sequences against the Repbase-derived RepeatMasker libraries using RepeatMasker (v4.1.0).

Note
Use the parameters "-nolow -norna -no is" when running RepeatMasker.

1.2.

Identify known repetitive elements by aligning the Limnodynastes dumerilii dumerilii genome sequences against the transposable element protein database using RepeatProteinMask (an application within the RepeatMasker package)

Note
Use the parameters "-noLowSimple -pvalue 0.0001 -engine ncbi" when running RepeatProteinMask.

2.

The following sub-steps are the process for de novo predictions to identify repetitive elements in the Limnodynastes dumerilii dumerilii genome assembly. de novo predictions to identify repetitive elements in the Limnodynastes dumerilii dumerilii genome assembly.

2.1.

Execute RepeatModeler (v2.0, RRID:SCR_015027) on the Limnodynastes dumerilii dumerilii assembly to build a de novo repeat library for this species.

2.2.

Employ RepeatMasker (v4.1.0) to align the Limnodynastes dumerilii dumerilii genome sequences against the de novo library for repetitive element identification.

3.

Identify tandem repeats in the Limnodynastes dumerilii dumerilii genome assembly by Tandem Repeats Finder (v4.09). Limnodynastes dumerilii dumerilii genome assembly by Tandem Repeats Finder (v4.09).

Note
Use the parameters "Match=2 Mismatch=7 Delta=7 PM=80 PI=10 Minscore=50 MaxPeriod=2000" when running Tandem Repeats Finder.

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