样本RNA要求
- 总RNA质量:≥ 3.0 μg
- RNA 浓度: ≥ 50 ng/μl
- RIN值 ≥ 7.5(植物与真菌),RIN值 ≥ 8.0(动物)
- RNA体积: 20 μl
- 纯度:
用1.2%琼脂糖凝胶电泳,120V,20分钟,无降解,28S:18S≥1.5,OD260:OD280=1.8~2.0。
测序数量要求
miRNA测序时,一样样本只需要10M
read(现在测序成本低,可以测到100M也没问题),每条read长50bp,单端测序,下面是一些测序公司的数据量:
|
Sequencer |
Strategy |
Sequencing
deep |
Company |
|
Illumina HiSeqTM 2500 |
SE50 |
General deep:8Mclean reads High
deep:15M clean Reads |
南京迪康金诺 |
|
Illumina HiSeq™ 2500 |
SE36 |
18.9~28.2M |
百迈客 |
|
Illumina |
SE50bp |
10M reads/sample |
美吉生物 |
|
HiSeq 2500 |
SE50 |
General deep:6~10M clean reads High
deep:15~20M clean Reads read/sample |
诺禾致源 |
|
|
SE36 OR SE50 |
General deep:10M reads High deep:20M
reads |
阅微基因 |
在网上找到了Novogene公司的一批样本的small
RNA-seq测序量,比较典型,如下所示:
|
SAMPLE |
READS |
BASES |
ERROR RATE
(%) |
Q 20
(%) |
Q 30
(%) |
GC CONTENT
(%) |
|
A1 |
10146979 |
0.51G |
0.01 |
98.6 |
96.94 |
48.9 |
|
A2 |
10262275 |
0.51G |
0.01 |
98.52 |
96.83 |
48.96 |
|
A3 |
11310590 |
0.57G |
0.01 |
98.53 |
96.83 |
48.98 |
|
B1 |
10852108 |
0.54G |
0.01 |
98.38 |
96.77 |
49.07 |
|
B2 |
14936611 |
0.75G |
0.01 |
98.43 |
96.82 |
48.96 |
|
B3 |
12674317 |
0.63G |
0.01 |
98.51 |
96.97 |
49 |
文献信息:Li A, Liu D, Wu J, et al. mRNA and Small RNA Transcriptomes
Reveal Insights into Dynamic Homoeolog Regulation of Allopolyploid
Heterosis in Nascent Hexaploid Wheat.[J]. Plant Cell, 2014,
26(5):1878.
数据分析流程
https://jma7s2j0dvbc888p4zf0s16y-wpengine.netdna-ssl.com/wp-content/uploads/2016/03/smrna.png
参考资料
-
Novogene small RNA seq
-
Illumina small RNA
seq
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