Single Cell ATAC Sequencing
基于10X Geomics ChromiumTM動(dòng)態(tài)微流控技術(shù),利用Tn5轉座酶酶切開(kāi)放染色質(zhì),形成短片段,單細胞ATAC測序在表觀(guān)基因組學(xué)水平上,揭示單細胞染色質(zhì)的可及性問(wèn)題,區分細胞異質(zhì)性,獲得開(kāi)放染色質(zhì)的位置、轉錄因子的結合位點(diǎn)、核小體的調控區域和染色質(zhì)狀態(tài)等信息,是單細胞表觀(guān)遺傳學(xué)的重要突破。
Alexandro E. Trevino et al. Cell. 2021 Sep
1.突破性改進(jìn)制核手段:跳過(guò)樣本消化步驟,直接凍存組織進(jìn)行制核。這種方法可以大大節省時(shí)間和資源,并且提高制核效率,細胞核捕獲率高達65%-80%
2.消除細胞解離偏差:消除由于消化偏好性造成的細胞解離偏差,保證制核質(zhì)量遠高于上機捕獲要求,可以為后續的分析提供更準確的結果。
3.嚴格質(zhì)量把控:烈冰全程進(jìn)行嚴格的質(zhì)量把控,從實(shí)驗設計到分析產(chǎn)出提供一站式服務(wù)流程,確??蛻?hù)獲得高質(zhì)量的數據和分析結果,并提供全面的支持和解決方案。
4.烈冰自主搭建分析云平臺,一鍵實(shí)現數據分析,包括peak calling、聚類(lèi)、TF-motif、細胞亞群、Marker基因和信號通路富集分析等
樣本類(lèi)型:
組織、血液、培養的細胞系、制備好的單細胞懸液
質(zhì)量要求:
1. 細胞活性大于70%
2. 濃度為500-2000細胞/μl
3. 體積不小于200μl
4. 細胞培養基及緩沖液不能含Ca2+和Mg2+
5. 細胞體積小于40μm
客戶(hù)樣本--懸液制備---活性檢測--活細胞富集--細胞核制備--核質(zhì)控檢測--單細胞核捕獲--細胞/轉錄本標簽添加--文庫構建--上機測序
Jason D, et al. Cell, 2018; Wenliang Wang et al. PNAS, 2020.
Darren A. Cusanovich, et al. Cell, 2018.
Jeffrey M., et al. Nature Biotechnology, 2019.
Jason D, et al. Cell, 2018.
左圖為單細胞RNA-seq和ATAC-seq數據整合:通過(guò)整合單細胞轉錄組和ATAC數據,確定ATAC細胞類(lèi)型注釋的可靠性與一致性。
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