Table 1

Human AID/APOBEC paralogs

Name
Genomic location
Exons
Deaminase domains
Expression
Cellular localization
Editing activity
Target
References

AID
12p13
5
1
Activated B cells, Testis
Mainly cytoplasmic, acts in the nucleus
DNA
Immunoglobulin gene
[3,31]
APOBEC1
12p13.1
5
1
Small intestine
Cytoplasmic/nuclear, acts in the nucleus
RNA, DNA
Apolipoprotein B mRNA
[1,2]
APOBEC2
6p21
3
1
Skeletal muscle, heart
Cytoplasmic/nuclear
Unknown
Unknown
[15,16]
APOBEC3A
22q13.1
5
1
Keratinocytes, blood
Cytoplasmic/nuclear
DNA
Adeno-associated virus, retrotransposons
[4,104]
APOBEC3B
22q13.1
8
2
Intestine, uterus, mammary gland, keratinocytes, other
Predominantly nuclear
DNA
Retroviruses, retrotransposons, HBV
[4,104]
APOBEC3C
22q13.1
4
1
Many tissues
Cytoplasmic/nuclear
DNA
Retroviruses, retrotransposons, HBV
[4]
APOBEC3DE
22q13.1
7
2
Thyroid, spleen, blood
Unknown
DNA
Retroviruses
[4,10,107]
APOBEC3F
22q13.1
8
2
Many tissues
Cytoplasmic
DNA
Retroviruses, retrotransposons, HBV
[4]
APOBEC3G
22q13.1
8
2
Many tissues, T cells
Cytoplasmic
DNA
Retroviruses, retrotransposons, HBV
[4,5]
APOBEC3H
22q13.1
5
1
Blood, thymus, thyroid, placenta
Unknown
DNA
Retroviruses
[10,107]
LOC196469*
12q23
1
2
Pseudogene
-
-
-
[10,107]
APOBEC4
1q25.3
2
1
Testis
Unknown
Unknown
Unknown
[14]

*This pseudogene originated from a recent retrotranspositional event. HBV, hepatitis B virus.

Conticello Genome Biology 2008 9:229   doi:10.1186/gb-2008-9-6-229