Human protein: serine/threonine-protein phosphatase 2A regulatory subunit B'' subunit alpha isoform 1
Human protein sequence: MAATYRLVVSTVNHYSSVVIDRRFEQAIHYCTGTCHTFTHGIDCIVVHHSVCADLLHIPVSQFKDADLNSMFLPHENGLSSAEGDYPQQAFTGIPRVKRGSTFQNTYNLKDIAGEAISFASGKIKEFSFEKLKNSNHAAYRKGRKVKSDSFNRRSVDLDLLCGHYNNDGNAPSFGLLRSSSVEEKPLSHRNSLDTNLTSMFLQNFSEEDLVTQILEKHKIDNFSSGTDIKMCLDILLKCSEDLKKCTDIIKQCIKKKSGSSISEGSGNDTISSSETVYMNVMTRLASYLKKLPFEFMQSGNNEALDLTELISNMPSLQLTPFSPVFGTEQPPKYEDVVQLSASDSGRFQTIELQNDKPNSRKMDTVQSIPNNSTNSLYNLEVNDPRTLKAVQVQSQSLTMNPLENVSSDDLMETLYIEEESDGKKALDKGQKTENGPSHELLKVNEHRAEFPEHATHLKKCPTPMQNEIGKIFEKSFVNLPKEDCKSKVSKFEEGDQRDFTNSSSQEEIDKLLMDLESFSQKMETSLREPLAKGKNSNFLNSHSQLTGQTLVDLEPKSKVSSPIEKVSPSCLTRIIETNGHKIEEEDRALLLRILESIEDFAQELVECKSSRGSLSQEKEMMQILQETLTTSSQANLSVCRSPVGDKAKDTTSAVLIQQTPEVIKIQNKPEKKPGTPLPPPATSPSSPRPLSPVPHVNNVVNAPLSINIPRFYFPEGLPDTCSNHEQTLSRIETAFMDIEEQKADIYEMGKIAKVCGCPLYWKAPMFRAAGGEKTGFVTAQSFIAMWRKLLNNHHDDASKFICLLAKPNCSSLEQEDFIPLLQDVVDTHPGLTFLKDAPEFHSRYITTVIQRIFYTVNRSWSGKITSTEIRKSNFLQTLALLEEEEDINQITDYFSYEHFYVIYCKFWELDTDHDLYISQADLSRYNDQASSSRIIERIFSGAVTRGKTIQKEGRMSYADFVWFLISEEDKRNPTSIEYWFRCMDVDGDGVLSMYELEYFYEEQCERMEAMGIEPLPFHDLLCQMLDLVKPAVDGKITLRDLKRCRMAHIFYDTFFNLEKYLDHEQRDPFAVQKDVENDGPEPSDWDRFAAEEYETLVAEESAQAQFQEGFEDYETDEPASPSEFGNKSNKILSASLPEKCGKLQSVDEE

HIV protein: nucleocapsid
Interaction type: activates
Description: HIV-1 Vpr forms a complex with HIV-1 nucleocapsid that directly activates PP2A
HIV protein sequence: MQRGNFRNQRKIVKCFNCGKEGHTARNCRAPRKKGCWKCGKEGHQMKDCTERQAN

HIV protein: Vpr
Interaction type: upregulates
Description: HIV-1 Vpr was found to upregulate PP2A in fission yeast
HIV protein sequence: MEQAPEDQGPQREPHNEWTLELLEELKNEAVRHFPRIWLHGLGQHIYETYGDTWAGVEAIIRILQQLLFIHFRIGCRHSRIGVTRQRRARNGASRS

HIV protein: Vpr
Interaction type: activates
Description: HIV-1 Vpr cell death causing peptide (amino acid residues 71-96) can activate the expression of PP2A when applied extracellularly to CD4+ T cells as well as cause the activation of PP2A from brain, liver, and adipose tissues
HIV protein sequence: MEQAPEDQGPQREPHNEWTLELLEELKNEAVRHFPRIWLHGLGQHIYETYGDTWAGVEAIIRILQQLLFIHFRIGCRHSRIGVTRQRRARNGASRS

HIV protein: Vpr
Interaction type: binds
Description: Amino-acid peptide sequence (residues 77-92) of HIV-1 Vpr binds to PP2A1. The sequence from HIV-1 89.6 strain is a cell penetrating and death domain
HIV protein sequence: MEQAPEDQGPQREPHNEWTLELLEELKNEAVRHFPRIWLHGLGQHIYETYGDTWAGVEAIIRILQQLLFIHFRIGCRHSRIGVTRQRRARNGASRS

HIV protein: Vpr
Interaction type: activates
Description: HIV-1 Vpr forms a complex with HIV-1 nucleocapsid that directly activates PP2A
HIV protein sequence: MEQAPEDQGPQREPHNEWTLELLEELKNEAVRHFPRIWLHGLGQHIYETYGDTWAGVEAIIRILQQLLFIHFRIGCRHSRIGVTRQRRARNGASRS

HIV protein: Tat
Interaction type: regulated by
Description: Protein phosphatase-2A (PP2A) and protein phosphatase-1 (PP1) regulate HIV-1 Tat-activated transcription through dephosphorylation of CDK9
HIV protein sequence: MEPVDPRLEPWKHPGSQPKTACTNCYCKKCCFHCQVCFITKALGISYGRKKRRQRRRAHQNSQTHQASLSKQPTSQPRGDPTGPKE

HIV protein: Tat
Interaction type: upregulates
Description: HIV-1 Tat upregulates the total levels of PP2A protein and downregulates the inactive form of phosphorylated PP2A, which leads to inhibit hTERT activity directly or indirectly in CD4+ T cells
HIV protein sequence: MEPVDPRLEPWKHPGSQPKTACTNCYCKKCCFHCQVCFITKALGISYGRKKRRQRRRAHQNSQTHQASLSKQPTSQPRGDPTGPKE

HIV protein: Tat
Interaction type: modulated by
Description: An increase in the amount of PP2A core enzyme with a concomitant decrease in the amount of PP2A holoenzyme inhibits HIV-1 Tat-stimulated transcription from the HIV-1 LTR promoter, indicating a role for PP2A in the modulation of HIV-1 gene expression
HIV protein sequence: MEPVDPRLEPWKHPGSQPKTACTNCYCKKCCFHCQVCFITKALGISYGRKKRRQRRRAHQNSQTHQASLSKQPTSQPRGDPTGPKE