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POL_VILV1
ID   POL_VILV1               Reviewed;        1506 AA.
AC   P23426;
DT   01-NOV-1991, integrated into UniProtKB/Swiss-Prot.
DT   28-FEB-2018, sequence version 2.
DT   03-AUG-2022, entry version 143.
DE   RecName: Full=Gag-Pol polyprotein;
DE   Contains:
DE     RecName: Full=Matrix protein p16;
DE   Contains:
DE     RecName: Full=Capsid protein p25;
DE   Contains:
DE     RecName: Full=Nucleocapsid protein p14;
DE   Contains:
DE     RecName: Full=Protease;
DE     AltName: Full=Retropepsin;
DE              EC=3.4.23.- {ECO:0000255|PROSITE-ProRule:PRU00275};
DE   Contains:
DE     RecName: Full=Reverse transcriptase/ribonuclease H;
DE              Short=RT;
DE              EC=2.7.7.49 {ECO:0000255|PROSITE-ProRule:PRU00405};
DE              EC=2.7.7.7 {ECO:0000255|PROSITE-ProRule:PRU00405};
DE              EC=3.1.26.4 {ECO:0000255|PROSITE-ProRule:PRU00408};
DE     AltName: Full=Exoribonuclease H;
DE              EC=3.1.13.2;
DE   Contains:
DE     RecName: Full=Deoxyuridine 5'-triphosphate nucleotidohydrolase;
DE              Short=dUTPase;
DE              EC=3.6.1.23;
DE   Contains:
DE     RecName: Full=Integrase;
DE              Short=IN;
DE              EC=2.7.7.- {ECO:0000250|UniProtKB:P03370};
DE              EC=3.1.-.- {ECO:0000250|UniProtKB:P03370};
GN   Name=pol;
OS   Maedi visna virus (strain 1514 / clone LV1-1KS1) (MVV) (Visna lentivirus).
OC   Viruses; Riboviria; Pararnavirae; Artverviricota; Revtraviricetes;
OC   Ortervirales; Retroviridae; Orthoretrovirinae; Lentivirus.
OX   NCBI_TaxID=11743;
OH   NCBI_TaxID=9940; Ovis aries (Sheep).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RX   PubMed=1847257; DOI=10.1016/0042-6822(91)90488-w;
RA   Staskus K.A., Retzel E.F., Lewis E.D., Wietgrefe S.W., Silsby J.L., Cyr S.,
RA   Rank J.M., Haase A.T., Fast D., Geiser P.T., Harty J.T., Kong S.H.,
RA   Cook R., Lahti C.J., Neufeld T.P., Porter T.E., Shoop E., Zachow K.R.;
RT   "Isolation of replication-competent molecular clones of visna virus.";
RL   Virology 181:228-240(1991).
CC   -!- FUNCTION: [Isoform Gag-Pol polyprotein]: Mediates, with Gag
CC       polyprotein, the essential events in virion assembly, including binding
CC       the plasma membrane, making the protein-protein interactions necessary
CC       to create spherical particles, recruiting the viral Env proteins, and
CC       packaging the genomic RNA via direct interactions with the RNA
CC       packaging sequence. {ECO:0000250|UniProtKB:P04585}.
CC   -!- FUNCTION: [Matrix protein p16]: Targets the polyprotein to the plasma
CC       membrane. {ECO:0000250|UniProtKB:P12497}.
CC   -!- FUNCTION: [Capsid protein p25]: Forms the core that encapsulates the
CC       genomic RNA-nucleocapsid complex in the virion.
CC       {ECO:0000250|UniProtKB:P04585}.
CC   -!- FUNCTION: [Nucleocapsid protein p14]: Encapsulates and protects viral
CC       dimeric unspliced genomic RNA (gRNA). Binds these RNAs through its zinc
CC       fingers. Acts as a nucleic acid chaperone which is involved in
CC       rearrangement of nucleic acid secondary structure during gRNA
CC       retrotranscription. Also facilitates template switch leading to
CC       recombination. {ECO:0000250|UniProtKB:P04585}.
CC   -!- FUNCTION: [Protease]: The aspartyl protease mediates proteolytic
CC       cleavages of Gag and Gag-Pol polyproteins during or shortly after the
CC       release of the virion from the plasma membrane. Cleavages take place as
CC       an ordered, step-wise cascade to yield mature proteins. This process is
CC       called maturation. Displays maximal activity during the budding process
CC       just prior to particle release from the cell. {ECO:0000255|PROSITE-
CC       ProRule:PRU00275}.
CC   -!- FUNCTION: [Reverse transcriptase/ribonuclease H]: RT is a
CC       multifunctional enzyme that converts the viral dimeric RNA genome into
CC       dsDNA in the cytoplasm, shortly after virus entry into the cell. This
CC       enzyme displays a DNA polymerase activity that can copy either DNA or
CC       RNA templates, and a ribonuclease H (RNase H) activity that cleaves the
CC       RNA strand of RNA-DNA heteroduplexes in a partially processive 3' to 5'
CC       endonucleasic mode. Conversion of viral genomic RNA into dsDNA requires
CC       many steps. A tRNA-Trp binds to the primer-binding site (PBS) situated
CC       at the 5' end of the viral RNA. RT uses the 3' end of the tRNA primer
CC       to perfom a short round of RNA-dependent minus-strand DNA synthesis.
CC       The reading proceeds through the U5 region and ends after the repeated
CC       (R) region which is present at both ends of viral RNA. The portion of
CC       the RNA-DNA heteroduplex is digested by the RNase H, resulting in a
CC       ssDNA product attached to the tRNA primer. This ssDNA/tRNA hybridizes
CC       with the identical R region situated at the 3' end of viral RNA. This
CC       template exchange, known as minus-strand DNA strong stop transfer, can
CC       be either intra- or intermolecular. RT uses the 3' end of this newly
CC       synthesized short ssDNA to perfom the RNA-dependent minus-strand DNA
CC       synthesis of the whole template. RNase H digests the RNA template
CC       except for a polypurine tract (PPT) situated at the 5' end of the
CC       genome. It is not clear if both polymerase and RNase H activities are
CC       simultaneous. RNase H probably can proceed both in a polymerase-
CC       dependent (RNA cut into small fragments by the same RT performing DNA
CC       synthesis) and a polymerase-independent mode (cleavage of remaining RNA
CC       fragments by free RTs). Secondly, RT performs DNA-directed plus-strand
CC       DNA synthesis using the PPT that has not been removed by RNase H as
CC       primers. PPT and tRNA primers are then removed by RNase H. The 3' and
CC       5' ssDNA PBS regions hybridize to form a circular dsDNA intermediate.
CC       Strand displacement synthesis by RT to the PBS and PPT ends produces a
CC       blunt ended, linear dsDNA copy of the viral genome that includes long
CC       terminal repeats (LTRs) at both ends. {ECO:0000255|PROSITE-
CC       ProRule:PRU00405}.
CC   -!- FUNCTION: [Integrase]: Catalyzes viral DNA integration into the host
CC       chromosome, by performing a series of DNA cutting and joining
CC       reactions. {ECO:0000250|UniProtKB:P03370}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=3'-end directed exonucleolytic cleavage of viral RNA-DNA
CC         hybrid.; EC=3.1.13.2;
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=dUTP + H2O = diphosphate + dUMP + H(+); Xref=Rhea:RHEA:10248,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:33019,
CC         ChEBI:CHEBI:61555, ChEBI:CHEBI:246422; EC=3.6.1.23;
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a 2'-deoxyribonucleoside 5'-triphosphate + DNA(n) =
CC         diphosphate + DNA(n+1); Xref=Rhea:RHEA:22508, Rhea:RHEA-COMP:17339,
CC         Rhea:RHEA-COMP:17340, ChEBI:CHEBI:33019, ChEBI:CHEBI:61560,
CC         ChEBI:CHEBI:173112; EC=2.7.7.49; Evidence={ECO:0000255|PROSITE-
CC         ProRule:PRU00405};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a 2'-deoxyribonucleoside 5'-triphosphate + DNA(n) =
CC         diphosphate + DNA(n+1); Xref=Rhea:RHEA:22508, Rhea:RHEA-COMP:17339,
CC         Rhea:RHEA-COMP:17340, ChEBI:CHEBI:33019, ChEBI:CHEBI:61560,
CC         ChEBI:CHEBI:173112; EC=2.7.7.7; Evidence={ECO:0000255|PROSITE-
CC         ProRule:PRU00405};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Endonucleolytic cleavage to 5'-phosphomonoester.; EC=3.1.26.4;
CC         Evidence={ECO:0000255|PROSITE-ProRule:PRU00408};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|PROSITE-ProRule:PRU00405};
CC       Note=The RT polymerase active site binds 2 magnesium ions.
CC       {ECO:0000255|PROSITE-ProRule:PRU00405};
CC   -!- SUBUNIT: [Integrase]: Homotetramer; further associates as a
CC       homohexadecamer. {ECO:0000250|UniProtKB:P35956}.
CC   -!- SUBCELLULAR LOCATION: [Matrix protein p16]: Virion {ECO:0000305}.
CC   -!- SUBCELLULAR LOCATION: [Capsid protein p25]: Virion {ECO:0000305}.
CC   -!- SUBCELLULAR LOCATION: [Nucleocapsid protein p14]: Virion {ECO:0000305}.
CC   -!- ALTERNATIVE PRODUCTS:
CC       Event=Ribosomal frameshifting; Named isoforms=2;
CC       Name=Gag-Pol polyprotein;
CC         IsoId=P23426-1; Sequence=Displayed;
CC       Name=Gag polyprotein;
CC         IsoId=P23424-1; Sequence=External;
CC   -!- PTM: [Isoform Gag-Pol polyprotein]: Specific enzymatic cleavages by the
CC       viral protease yield mature proteins. {ECO:0000305}.
CC   -!- MISCELLANEOUS: The reverse transcriptase is an error-prone enzyme that
CC       lacks a proof-reading function. High mutations rate is a direct
CC       consequence of this characteristic. RT also displays frequent template
CC       swiching leading to high recombination rate. Recombination mostly
CC       occurs between homologous regions of the two copackaged RNA genomes. If
CC       these two RNA molecules derive from different viral strains, reverse
CC       transcription will give rise to highly recombinated proviral DNAs.
CC       {ECO:0000255|PROSITE-ProRule:PRU00405}.
CC   -!- MISCELLANEOUS: [Isoform Gag-Pol polyprotein]: Produced by a -1
CC       ribosomal frameshifting between gag and pol.
CC       {ECO:0000250|UniProtKB:P35956}.
CC   -!- SIMILARITY: Belongs to the retroviral Pol polyprotein family.
CC       {ECO:0000305}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=AAA17524.1; Type=Erroneous gene model prediction; Evidence={ECO:0000305};
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DR   EMBL; M60609; AAA17524.1; ALT_SEQ; Unassigned_RNA.
DR   SMR; P23426; -.
DR   MEROPS; A02.006; -.
DR   GO; GO:0019028; C:viral capsid; IEA:UniProtKB-KW.
DR   GO; GO:0004190; F:aspartic-type endopeptidase activity; IEA:UniProtKB-KW.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0003887; F:DNA-directed DNA polymerase activity; IEA:UniProtKB-EC.
DR   GO; GO:0004170; F:dUTP diphosphatase activity; IEA:UniProtKB-EC.
DR   GO; GO:0004533; F:exoribonuclease H activity; IEA:UniProtKB-EC.
DR   GO; GO:0003964; F:RNA-directed DNA polymerase activity; IEA:UniProtKB-KW.
DR   GO; GO:0004523; F:RNA-DNA hybrid ribonuclease activity; IEA:UniProtKB-EC.
DR   GO; GO:0008270; F:zinc ion binding; IEA:InterPro.
DR   GO; GO:0015074; P:DNA integration; IEA:UniProtKB-KW.
DR   GO; GO:0006310; P:DNA recombination; IEA:UniProtKB-KW.
DR   GO; GO:0075713; P:establishment of integrated proviral latency; IEA:UniProtKB-KW.
DR   GO; GO:0009117; P:nucleotide metabolic process; IEA:UniProtKB-KW.
DR   GO; GO:0006508; P:proteolysis; IEA:UniProtKB-KW.
DR   GO; GO:0046718; P:viral entry into host cell; IEA:UniProtKB-KW.
DR   GO; GO:0044826; P:viral genome integration into host DNA; IEA:UniProtKB-KW.
DR   CDD; cd07557; trimeric_dUTPase; 1.
DR   Gene3D; 1.10.10.200; -; 1.
DR   Gene3D; 1.10.1200.30; -; 1.
DR   Gene3D; 1.10.375.10; -; 1.
DR   Gene3D; 2.30.30.10; -; 1.
DR   Gene3D; 2.40.70.10; -; 1.
DR   Gene3D; 2.70.40.10; -; 1.
DR   Gene3D; 3.30.420.10; -; 2.
DR   Gene3D; 3.30.70.270; -; 3.
DR   InterPro; IPR001969; Aspartic_peptidase_AS.
DR   InterPro; IPR043502; DNA/RNA_pol_sf.
DR   InterPro; IPR029054; dUTPase-like.
DR   InterPro; IPR036157; dUTPase-like_sf.
DR   InterPro; IPR033704; dUTPase_trimeric.
DR   InterPro; IPR045345; Gag_p24_C.
DR   InterPro; IPR000721; Gag_p24_N.
DR   InterPro; IPR017856; Integrase-like_N.
DR   InterPro; IPR036862; Integrase_C_dom_sf_retrovir.
DR   InterPro; IPR001037; Integrase_C_retrovir.
DR   InterPro; IPR001584; Integrase_cat-core.
DR   InterPro; IPR003308; Integrase_Zn-bd_dom_N.
DR   InterPro; IPR001995; Peptidase_A2_cat.
DR   InterPro; IPR021109; Peptidase_aspartic_dom_sf.
DR   InterPro; IPR018061; Retropepsins.
DR   InterPro; IPR008916; Retrov_capsid_C.
DR   InterPro; IPR008919; Retrov_capsid_N.
DR   InterPro; IPR043128; Rev_trsase/Diguanyl_cyclase.
DR   InterPro; IPR012337; RNaseH-like_sf.
DR   InterPro; IPR002156; RNaseH_domain.
DR   InterPro; IPR036397; RNaseH_sf.
DR   InterPro; IPR000477; RT_dom.
DR   InterPro; IPR010659; RVT_connect.
DR   InterPro; IPR001878; Znf_CCHC.
DR   InterPro; IPR036875; Znf_CCHC_sf.
DR   Pfam; PF00692; dUTPase; 1.
DR   Pfam; PF00607; Gag_p24; 1.
DR   Pfam; PF19317; Gag_p24_C; 1.
DR   Pfam; PF02022; Integrase_Zn; 1.
DR   Pfam; PF00075; RNase_H; 1.
DR   Pfam; PF00665; rve; 1.
DR   Pfam; PF00077; RVP; 1.
DR   Pfam; PF00078; RVT_1; 1.
DR   Pfam; PF06815; RVT_connect; 1.
DR   Pfam; PF00098; zf-CCHC; 2.
DR   SMART; SM00343; ZnF_C2HC; 2.
DR   SUPFAM; SSF46919; SSF46919; 1.
DR   SUPFAM; SSF47943; SSF47943; 1.
DR   SUPFAM; SSF50122; SSF50122; 1.
DR   SUPFAM; SSF50630; SSF50630; 1.
DR   SUPFAM; SSF51283; SSF51283; 1.
DR   SUPFAM; SSF53098; SSF53098; 2.
DR   SUPFAM; SSF56672; SSF56672; 1.
DR   SUPFAM; SSF57756; SSF57756; 1.
DR   PROSITE; PS50175; ASP_PROT_RETROV; 1.
DR   PROSITE; PS00141; ASP_PROTEASE; 1.
DR   PROSITE; PS50994; INTEGRASE; 1.
DR   PROSITE; PS51027; INTEGRASE_DBD; 1.
DR   PROSITE; PS50879; RNASE_H_1; 1.
DR   PROSITE; PS50878; RT_POL; 1.
DR   PROSITE; PS50158; ZF_CCHC; 2.
DR   PROSITE; PS50876; ZF_INTEGRASE; 1.
PE   3: Inferred from homology;
KW   Aspartyl protease; Capsid protein; DNA integration; DNA recombination;
KW   DNA-binding; Endonuclease; Hydrolase; Magnesium; Metal-binding;
KW   Multifunctional enzyme; Nuclease; Nucleotide metabolism;
KW   Nucleotidyltransferase; Protease; Repeat; Ribosomal frameshifting;
KW   RNA-directed DNA polymerase; Transferase; Viral genome integration; Virion;
KW   Virus entry into host cell; Zinc; Zinc-finger.
FT   CHAIN           1..143
FT                   /note="Matrix protein p16"
FT                   /id="PRO_0000443362"
FT   CHAIN           144..363
FT                   /note="Capsid protein p25"
FT                   /id="PRO_0000443363"
FT   CHAIN           364..442
FT                   /note="Nucleocapsid protein p14"
FT                   /id="PRO_0000443364"
FT   CHAIN           443..540
FT                   /note="Protease"
FT                   /id="PRO_0000038861"
FT   CHAIN           541..1091
FT                   /note="Reverse transcriptase/ribonuclease H"
FT                   /id="PRO_0000038862"
FT   CHAIN           1092..1225
FT                   /note="Deoxyuridine 5'-triphosphate nucleotidohydrolase"
FT                   /id="PRO_0000038863"
FT   CHAIN           1226..1506
FT                   /note="Integrase"
FT                   /id="PRO_0000038864"
FT   DOMAIN          459..530
FT                   /note="Peptidase A2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00275"
FT   DOMAIN          587..776
FT                   /note="Reverse transcriptase"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00405"
FT   DOMAIN          971..1093
FT                   /note="RNase H type-1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00408"
FT   DOMAIN          1270..1430
FT                   /note="Integrase catalytic"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00457"
FT   ZN_FING         385..402
FT                   /note="CCHC-type 1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00047"
FT   ZN_FING         404..421
FT                   /note="CCHC-type 2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00047"
FT   ZN_FING         1228..1269
FT                   /note="Integrase-type"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00450"
FT   DNA_BIND        1447..1499
FT                   /note="Integrase-type"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00506"
FT   ACT_SITE        464
FT                   /note="Protease; shared with dimeric partner"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00275"
FT   BINDING         652
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /ligand_note="catalytic; for reverse transcriptase
FT                   activity"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00405"
FT   BINDING         727
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /ligand_note="catalytic; for reverse transcriptase
FT                   activity"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00405"
FT   BINDING         728
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /ligand_note="catalytic; for reverse transcriptase
FT                   activity"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00405"
FT   BINDING         980
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /ligand_note="catalytic; for RNase H activity"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00408"
FT   BINDING         1012
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /ligand_note="catalytic; for RNase H activity"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00408"
FT   BINDING         1032
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /ligand_note="catalytic; for RNase H activity"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00408"
FT   BINDING         1085
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /ligand_note="catalytic; for RNase H activity"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00408"
FT   BINDING         1237
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00450"
FT   BINDING         1241
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00450"
FT   BINDING         1265
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00450"
FT   BINDING         1268
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00450"
FT   BINDING         1291
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="3"
FT                   /ligand_note="catalytic; for integrase activity"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00457"
FT   BINDING         1343
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="3"
FT                   /ligand_note="catalytic; for integrase activity"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00457"
FT   BINDING         1379
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="3"
FT                   /ligand_note="catalytic; for integrase activity"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   1506 AA;  171964 MW;  2754F27EADA1204F CRC64;
     MAKQGSKEKK GYPELKEVIK ATCKIRVGPG KETLTEGNCL WALKTIDFIF EDLKTEPWTI
     TKMYTVWDRL KGLTPEETSK REFASLQATL ACIMCSQMGM KPETVQAAKG IISMKEGLQE
     NKEAKGEKVE QLYPNLEKHR EVYPIVNLQA GGRSWKAVES VVFQQLQTVA MQHGLVSEDF
     ERQLAYYATT WTSKDILEVL AMMPGNRAQK ELIQGKLNEE AERWVRQNPP GPNVLTVDQI
     MGVGQTNQQA SQANMDQARQ ICRQWVITAL RSVRHMSHRP GNPMLVKQKN TESYEDFIAR
     LLEAIDAEPV TDPIKTYLKV TLSYTNASTD CQKQMDRTLG TRVQQATVEE KMQACRDVGS
     EGFKMQLLAQ ALRPQGKAGH KGVNQKCYNC GKPGHLARQC RQGIICHHCG KRGHMQKDCR
     QKKQQGKQQE GATCGAVRAP YVVTEAPPKI EIKVGTRWKK LLVDTGADKT IVTSHDMSGI
     PKGRIILQGI GGIIEGEKWE QVHLQYKDKI IRGTIVVLAT SPVEVLGRDN MSELGIGLIM
     ANLEEKKIPI TEVRLKEGCK GPHIAQWPLT QEKLEGLKEI VDRLEKEGKV GRAPPHWTCN
     TPIFCIKKKS GKWRMLIDFR ELNKQTEDLA EAQLGLPHPG GLQRKKHVTI LDIGDAYFTI
     PLYEPYRQYT CFTMLSPNNL GPCVRYYWKV LPQGWKLSPS VYQFTMQKIL RGWIEEHPMI
     QFGIYMDDIY IGSDLGLEEH RGIVNELASY IAQYGFMLPE DKRQEGYPAK WLGFELHPEK
     WKFQKHTLPE ITEGPITLNK LQKLVGDLVW RQSLIGKSIP NILKLMEGDR ALQSERYIES
     IHVREWEACR QKLKEMEGNY YDEEKDIYGQ LDWGNKAIEY IVFQEKGKPL WVNVVHSIKN
     LSQAQQIIKA AQKLTQEVII RTGKIPWILL PGREEDWILE LQMGNINWMP SFWSCYKGSV
     RWKKRNVIAE VVSGPTYYTD GGKKNGRGSL GYIASTGEKF RIYEEGTNQQ LELRAIEEAC
     KQGPEKMNIV TDSRYAYEFM LRNWDEEVIR NPIQARIMEL MHNKEKIGVH WVPGHKGIPQ
     NEEIDRYISE IFLAKEGRGI LQKRAEDAGY DLICPQEISI PAGQVKRIAI DLKINLKKDQ
     WAMIGTKSSF ANKGVFVQGG IIDSGYQGTI QVVIYNSNNK EVVIPQGRKF AQLILMPLIH
     EELEPWGETR KTERGEQGFG STGMYWIENI PLAEEEHNKW HQDAVSLHLE FGIPRTAAED
     IVQQCDVCQE NKMPSTLRGS NKRGIDHWQV DYTHYEDKII LVWVETNSGL IYAERVKGET
     GQEFRVQTMK WYAMFAPKSL QSDNGPAFVA ESTQLLMKYL GIEHTTGIPW NPQSQALVER
     THQTLKNTLE KLIPMFNAFE SALAGTLITL NIKRKGGLGT SPMDIFIFNK EQQRIQQQSK
     SKQEKIRFCY YRTRKRGHPG EWQGPTQVLW GGDGAIVVKD RGTDRYLVIA NKDVKFIPPP
     KEIQKE
 
 
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