Table 1 Recommendations for BE selection for precision cytosine base editing.

From: Expanding the genome-targeting scope and the site selectivity of high-precision base editors

Distance of target C from PAM

Bystander

Recommended BEs

<−19

no

nCDA1-BE3, nCDA1Δ198-BE3, A3A-NL-BE3

−19

no

nCDA1-BE3, nCDA1Δ198-BE3, A3A-NL-BE3

CCDDD

cCDA1-BE3

−18

no

nCDA1Δ198-BE3, n/cCDA1-BE3, A3A-NL-BE3

NCN

nCDA1Δ(194-188)-BE3

−17

no

nCDA1Δ198-BE3, cCDA1-BE3, A3A-BE3, nCDA1-BE3, BE3

DCN

nCDA1Δ(194-188)-BE3

CCDDDD

BE3

−16

no

BE3, nCDA1Δ198-BE3, A3A-BE3

DDDCC

cCDA1-BE3

TCC

cCDA1-BE3, YEE-BE3, BE-PAPAPAP

NCD

A3AΔ182-BE3, A3A(Y130F)Δ186-BE3

−15

no

BE3, nCDA1Δ198-BE3, A3A-BE3

CDCD

BE-PAPAPAP, A3AΔ182-BE3, A3A(Y130F)Δ186-BE3, YEE-BE3

DCN

A3AΔ182-BE3, A3A(Y130F)Δ186-BE3

RCCD

BE-PAPAPAP

−14

no

BE3, A3A-BE3, nCDA1-BE3

DDCC

BE-PAPAPAP

>−14

no

A3A-BE3, nCDA1-BE3, BE3

  1. The C to be edited is underlined, “no bystander” means absence of other Cs from the activity window of the BEs. N: any nucleotide (including a possible bystander C), D: not C (i.e., A, G or T), R: A or G.