3.5.4.B9 C243A/C321A/C356A the mutation has no effect on localization, deamination, oligomerization, or HIV-1 Vif-deficient restriction capabilities. The mutant is only partially resistant to inhibitor MN256.0105, with recovered deamination efficiency of 19% 722064 3.5.4.B9 C288A/C291A the mutant enzyme shows about 18% activity compared to the wild type enzyme 723260 3.5.4.B9 C321A the mutation has no effect on localization, deamination, oligomerization, or HIV-1 Vif-deficient restriction capabilities. The mutant is only partially resistant to inhibitor MN256.0105, with recovered deamination efficiency of 21% 722064 3.5.4.B9 C97A/C100A the mutant enzyme shows about 18% activity compared to the wild type enzyme 723260 3.5.4.B9 D264A 5.1% of wild-type activity 754123 3.5.4.B9 D264A 5.1% of wild-type activtiy 754123 3.5.4.B9 D264A the variant has 5% of the catalytic efficiency of the wild type protein 734319 3.5.4.B9 D316R/D317R the mutant shows about 180% deamination activity and about 200% single-stranded DNA binding compared to the wild type enzyme 723261 3.5.4.B9 D316R/D317R the mutations increase affinity for substrate and deamination specificity 722665 3.5.4.B9 D370A 15.8% of wild-type activity 754123 3.5.4.B9 D370A 15.8% of wild-type activtiy 754123 3.5.4.B9 D370A the variant has 16% of the catalytic efficiency of the wild type protein 734319 3.5.4.B9 E259Q site-directed mutagenesis 719945 3.5.4.B9 F126A/W127A site-directed mutagenesis, the N-terminal CD1 domain mutant, that shows disrupted dimerization at the predicted CD1-CD1 dimer interface, predominantly converts Apo3G to a monomer that binds single-stranded DNA, Alu RNA, and catalyzes processive C to U deaminations with 3'-5' deamination polarity, similar to wild-type Apo3G. The mutation causes severe disruption in oligomer formation resulting in about 92% monomers and 8% dimers, with no larger oligomer forms detected 712428 3.5.4.B9 F126A/W127A the mutant has altered DNA scanning properties in jumping which results in decreased abilities to induce mutagenesis during reverse transcription. The mutant demonstrates a stronger preference than native enzyme for C residues at the 5'-ssDNA end and is processive 722698 3.5.4.B9 F126A/W127A the mutant interferes with head-to-head dimerization but retains many of the salient biochemical properties observed in the native protein 721999 3.5.4.B9 F202A the mutation causes a decrease of the enzyme activity 722114 3.5.4.B9 F241K the mutation causes a decrease of the enzyme activity 722114 3.5.4.B9 F268A 25.2% of wild-type activity 754123 3.5.4.B9 F268A 25.2% of wild-type activtiy 754123 3.5.4.B9 F268A the variant has 25% of the catalytic efficiency of the wild type protein 734319 3.5.4.B9 F298A the mutant shows about 10% deamination activity compared to the wild type enzyme 723261 3.5.4.B9 H186R the clinical mutant is associated with high viral loads. The mutant has altered DNA scanning properties in sliding which results in decreased abilities to induce mutagenesis during reverse transcription. The mutant retains a strong preference for deamination of the 5'-CCC motif and exhibits a processivity factor that is similar to native enzym 722698 3.5.4.B9 H248G 158% of wild-type activity 754123 3.5.4.B9 H248G the variant has 158% of the catalytic efficiency of the wild type protein 734319 3.5.4.B9 H250A 266% of wild-type activity 754123 3.5.4.B9 H250A 266% of wild-type activtiy 754123 3.5.4.B9 H250A the variant has 266% of the catalytic efficiency of the wild type protein 734319 3.5.4.B9 H250G 158% of wild-type activtiy 754123 3.5.4.B9 H257A the mutant enzyme shows about 10% activity compared to the wild type enzyme 723260 3.5.4.B9 H81A the mutant enzyme shows about 25% activity compared to the wild type enzyme 723260 3.5.4.B9 I314A/Y315A site-directed mutagenesis, C-terminal CD2 domain mutant, C-terminal CD2 domain mutant, mutation at the Apo2 tetrameric interface and predicted CD1 oligomerization region, the mutant contains about 12% tetramers with no larger oligomeric forms 712428 3.5.4.B9 L235A the mutation causes a decrease of the enzyme activity 722114 3.5.4.B9 L235K the mutation causes a decrease of the enzyme activity 722114 3.5.4.B9 L242A the mutation causes a decrease of the enzyme activity 722114 3.5.4.B9 L242K the mutation causes a decrease of the enzyme activity 722114 3.5.4.B9 additional information CD2-2, possessing the deamination activity, incorporated efficiently into HIV-1 is unable to mutate viral cDNA. Construction of three A3G mutants CD1-1, CD2-2 and CD2-1, which contain duplicate CD1 domain, duplicate CD2 domain, and position switched CD domain, respectively. The two CD domains are functionally equivalent in virion encapsidation and the interaction with HIV-1 Vif of hA3G, whereas CD domain switch or replacement greatly affect the sensitivity to Vif-induced degradation, editing and antiviral activity of hA3G. The switch of the CD domain affects nucleotide sequence preference pattern of the deaminase. The mutants show a nucleotide sequence preference pattern 721103 3.5.4.B9 additional information comparison of Apo3G native and monomeric N-mutant F/W ssDNA substrate binding and catalysis, overview 712428 3.5.4.B9 additional information phospho-mimetic mutations inhibit DNA cytidine deaminase activity 719945 3.5.4.B9 N244A the mutant shows no deamination activity 723261 3.5.4.B9 P210A 1.4% of wild-type activity 754123 3.5.4.B9 P210A 1.4% of wild-type activtiy 754123 3.5.4.B9 P210A the variant has 1% of the catalytic efficiency of the wild type protein 734319 3.5.4.B9 P210G 9.9% of wild-type activity 754123 3.5.4.B9 P210G 9.9% of wild-type activtiy 754123 3.5.4.B9 P210G the variant has 10% of the catalytic efficiency of the wild type protein 734319 3.5.4.B9 Q245A 5.5% of wild-type activity 754123 3.5.4.B9 Q245A 5.5% of wild-type activtiy 754123 3.5.4.B9 Q245A the mutation nearly abolishes the catalytic efficiency to 5% compared to the wild type protein 734319 3.5.4.B9 Q380A 68.5% of wild-type activity 754123 3.5.4.B9 Q380A 68.5% of wild-type activtiy 754123 3.5.4.B9 Q380A the variant has 68% of the catalytic efficiency of the wild type protein 734319 3.5.4.B9 R213E the mutant shows about 3% deamination activity compared to the wild type enzyme 723261 3.5.4.B9 R215E the mutant shows no deamination activity 723261 3.5.4.B9 R256A 1.3% of wild-type activity 754123 3.5.4.B9 R256A 1.3% of wild-type activtiy 754123 3.5.4.B9 R256A the mutation nearly abolishes the catalytic efficiency to 1% compared to the wild type protein 734319 3.5.4.B9 R256E the mutant shows about 3% deamination activity compared to the wild type enzyme 723261 3.5.4.B9 R313A/D316A/D317A/Q318A site-directed mutagenesis, C-terminal CD2 domain mutant, mutation at the Apo2 tetrameric interface and predicted CD1 oligomerization region, the mutant contains about 12% tetramers with no larger oligomeric forms 712428 3.5.4.B9 R313E/R320D the mutant shows no deamination activity and about 75% single-stranded DNA binding compared to the wild type enzyme 723261 3.5.4.B9 R374A 3.4% of wild-type activity 754123 3.5.4.B9 R374A 3.4% of wild-type activtiy 754123 3.5.4.B9 R374A the variant has 3% of the catalytic efficiency of the wild type protein 734319 3.5.4.B9 R374E/R376D the mutant shows less than 10% deamination activity and about 50% single-stranded DNA binding compared to the wild type enzyme 723261 3.5.4.B9 R376A 14.9% of wild-type activity 754123 3.5.4.B9 R376A 14.9% of wild-type activtiy 754123 3.5.4.B9 R376A the variant has 15% of the catalytic efficiency of the wild type protein 734319 3.5.4.B9 T203A the mutation causes a decrease of the enzyme activity 722114 3.5.4.B9 T218A site-directed mutagenesis 719945 3.5.4.B9 T218E site-directed mutagenesis 719945 3.5.4.B9 T27A site-directed mutagenesis 719945 3.5.4.B9 T27E site-directed mutagenesis 719945 3.5.4.B9 V233A the mutation causes a decrease of the enzyme activity 722114 3.5.4.B9 V233K the mutation causes a decrease of the enzyme activity 722114 3.5.4.B9 W232A the mutation causes a decrease of the enzyme activity 722114 3.5.4.B9 W285A the mutant shows no deamination activity 723261 3.5.4.B9 Y124A/Y125A site-directed mutagenesis, the N-terminal CD1 domain mutant is composed of roughly 47% monomers, 42% dimers, 10% tetramers, and 1% much larger molecular mass species of about 650 kDa 712428 3.5.4.B9 Y315A the mutant shows no deamination activity 723261