SGID Silkworm Genome Informatics Database
Gene
KWMTBOMO16282
Pre Gene Modal
BGIBMGA002957
Annotation
PREDICTED:_zinc_finger_CCHC_domain-containing_protein_13-like_[Bombyx_mori]
Full name
Gag polyprotein      
Alternative Name
Pr55Gag
Location in the cell
Nuclear   Reliability : 2.112
 

Sequence

CDS
ATGCGACGTGTCACCCAAACCGATGCGGAGGTTATTCCAACGTTCCGGCCGGATGAAAAATCTAGCAACGTCAAGGGATGGCTGCACAAGATCGACCAGTTGGATCACGTATATGGATGGGACAACAAAGACTGCCAGTTCATCATGCAGATATGTCTTCGTGGGTCGGCTAGGGATTGTGCGATACACCACCGCAACTATACTACACATCCGCGAATGGCTACCACATGGAGAAGAGAAGGTGCTGTTACTCCAGTTGCAAGAGGGACCGACTTTCAACCAAAGAAATGTTACGCCTGCCGAAGAGAAGGTCATGAAACAAAGAACTGCAAAGAGCCGCGCTGCGAGGTGTGCCATCGCCCGGGACACACGTCGGTCAGCTGA
Protein
MRRVTQTDAEVIPTFRPDEKSSNVKGWLHKIDQLDHVYGWDNKDCQFIMQICLRGSARDCAIHHRNYTTHPRMATTWRREGAVTPVARGTDFQPKKCYACRREGHETKNCKEPRCEVCHRPGHTSVS

Summary

Description
Gag polyprotein: Mediates, with Gag-Pol polyprotein, the essential events in virion assembly, including binding the plasma membrane, making the protein-protein interactions necessary to create spherical particles, recruiting the viral Env proteins, and packaging the genomic RNA via direct interactions with the RNA packaging sequence (Psi).
Matrix protein p17: Targets the polyprotein to the plasma membrane via a multipartite membrane-binding signal, that includes its myristoylated N-terminus (By similarity). Matrix protein is part of the pre-integration complex. Implicated in the release from host cell mediated by Vpu. Binds to RNA (By similarity).
Capsid protein p24: Forms the conical core that encapsulates the genomic RNA-nucleocapsid complex in the virion. Most core are conical, with only 7% tubular. The core is constituted by capsid protein hexamer subunits. The core is disassembled soon after virion entry (By similarity). Host restriction factors such as TRIM5-alpha or TRIMCyp bind retroviral capsids and cause premature capsid disassembly, leading to blocks in reverse transcription. Capsid restriction by TRIM5 is one of the factors which restricts HIV-1 to the human species. Host PIN1 apparently facilitates the virion uncoating (By similarity). On the other hand, interactions with PDZD8 or CYPA stabilize the capsid (By similarity).
Nucleocapsid protein p7: Encapsulates and protects viral dimeric unspliced genomic RNA (gRNA). Binds these RNAs through its zinc fingers. Acts as a nucleic acid chaperone which is involved in rearangement of nucleic acid secondary structure during gRNA retrotranscription. Also facilitates template switch leading to recombination. As part of the polyprotein, participates in gRNA dimerization, packaging, tRNA incorporation and virion assembly.
p6-gag: Plays a role in budding of the assembled particle by interacting with the host class E VPS proteins TSG101 and PDCD6IP/AIP1.
Catalytic Activity
3'-end directed exonucleolytic cleavage of viral RNA-DNA hybrid.
Endohydrolysis of RNA in RNA/DNA hybrids. Three different cleavage modes: 1. sequence-specific internal cleavage of RNA. Human immunodeficiency virus type 1 and Moloney murine leukemia virus enzymes prefer to cleave the RNA strand one nucleotide away from the RNA-DNA junction. 2. RNA 5'-end directed cleavage 13-19 nucleotides from the RNA end. 3. DNA 3'-end directed cleavage 15-20 nucleotides away from the primer terminus.
a 2'-deoxyribonucleoside 5'-triphosphate + DNA(n) = diphosphate + DNA(n+1)
Cofactor
Mg(2+)
Subunit
Gag polyprotein: Homotrimer; further assembles as hexamers of trimers. Oligomerization possibly creates a central hole into which the cytoplasmic tail of the gp41 envelope protein may be inserted.Gag polyprotein: Interacts with host TRIM22; this interaction seems to disrupt proper trafficking of Gag polyprotein and may interfere with budding. Gag polyprotein: Interacts with host PDZD8. Matrix protein p17: Homotrimer; further assembles as hexamers of trimers. Matrix protein p17: Interacts with gp41 (via C-terminus). Matrix protein p17: Interacts with host CALM1; this interaction induces a conformational change in the Matrix protein, triggering exposure of the myristate group. Matrix protein p17: Interacts with host AP3D1; this interaction allows the polyprotein trafficking to multivesicular bodies during virus assembly. Matrix protein p17: Part of the pre-integration complex (PIC) which is composed of viral genome, matrix protein, Vpr and integrase. Capsid protein p24: Homodimer; the homodimer further multimerizes as homohexamers or homopentamers. Capsid protein p24: Interacts with human PPIA/CYPA. Capsid protein p24: Interacts with human NUP153. Capsid protein p24: Interacts with host PDZD8; this interaction stabilizes the capsid. Capsid protein p24: Interacts with monkey TRIM5; this interaction destabilizes the capsid. p6-gag interacts with Vpr; this interaction allows Vpr incorporation into the virion. p6-gag interacts with host TSG101. p6-gag interacts with host PDCD6IP/AIP1.
Miscellaneous
HIV-1 lineages are divided in three main groups, M (for Major), O (for Outlier), and N (for New, or Non-M, Non-O). The vast majority of strains found worldwide belong to the group M. Group O seems to be endemic to and largely confined to Cameroon and neighboring countries in West Central Africa, where these viruses represent a small minority of HIV-1 strains. The group N is represented by a limited number of isolates from Cameroonian persons. The group M is further subdivided in 9 clades or subtypes (A to D, F to H, J and K).
Similarity
Belongs to the primate lentivirus group gag polyprotein family.
Keywords
3D-structure   AIDS   Capsid protein   Host cell membrane   Host cytoplasm   Host endosome   Host membrane   Host nucleus   Host-virus interaction   Lipoprotein   Membrane   Metal-binding   Methylation   Myristate   Phosphoprotein   Repeat   Ribosomal frameshifting   RNA-binding   Viral budding   Viral budding via the host ESCRT complexes   Viral nucleoprotein   Viral release from host cell   Virion   Zinc   Zinc-finger  
Feature
chain  Gag polyprotein
peptide  Spacer peptide 1
EMBL
BABH01010590    BABH01024735    BABH01024736    KQ972323    KXZ75922.1    U42720    + More
AAB47723.1    KF859747    AHC30187.1    L11769    AAA44689.1    AF484513    AAN73754.1    AF484494    AAN73583.1    GU245717    ADD31665.1    KR860760    AKN05007.1    KR860711    AKN04909.1    MH971628    AYE55483.1    GQ431214    ACV94279.1    AAN73755.1    AJ519489    CAD59562.1    AF184496    AAF28628.1    EU110090    ABW86715.1    GQ431487    ACV94462.1    AAN73584.1    KJ671537    AIA09009.1    FJ155131    ACI05374.1    JF804766    AEE41037.1    GU245738    ADD31683.1    AY492788    AAT06727.1    KR860645    AKN04777.1    AF484502    AAN73655.1    AF484522    AAN73835.1    AY253304    AAQ98120.1    KF716490    AHA33898.1    DQ396380    ABF00749.1    KR860891    AKN05269.1    EU581828    ACD02839.1    AY803372    AAV50143.1    KU921966    APA29369.1    AJ488927    CAD44561.1    CAD58643.1    JX202935    AGC32287.1    KF823032    AHH85799.1    AY455785    AAS59240.1    KF823025    AHH85792.1    AY803367    AAV50140.1    AAN73836.1    MH971621    AYE55476.1    AY772967    AAV85026.1    EF513541    ABU48907.1    MH971715    AYE55570.1    FJ155088    ACI05334.1    KX302424    AOH69338.1    AF184502    AAF28634.1    FJ606395    ACU31735.1    GQ431503    ACV94475.1    GQ431509    ACV94481.1    KX302466    AOH69372.1    MH971638    AYE55493.1    GU458744    ADJ58364.1    GQ430961    ACV94180.1    AAN73656.1    M22639    KX302467    AOH69374.1    MF109468    AVE26833.1    KX302509    AOH69406.1    FJ606125    ACU31465.1    JQ403079    AFM44393.1    AY772965    AAV85025.1    AY371157    AAR22188.1   
Pfam
PF17919   RT_RNaseH_2        + More
PF14291   DUF4371
PF17921   Integrase_H2C2
PF00665   rve
PF00078   RVT_1
PF00540   Gag_p17
PF00607   Gag_p24
PF00098   zf-CCHC
PF08705   Gag_p6
PF00552   IN_DBD_C
PF06815   RVT_connect
PF06817   RVT_thumb
PF00077   RVP
PF02022   Integrase_Zn
PF00075   RNase_H
Interpro
IPR036875   Znf_CCHC_sf        + More
IPR001878   Znf_CCHC       
IPR025398   DUF4371       
IPR041577   RT_RNaseH_2       
IPR001584   Integrase_cat-core       
IPR012337   RNaseH-like_sf       
IPR021109   Peptidase_aspartic_dom_sf       
IPR000477   RT_dom       
IPR036397   RNaseH_sf       
IPR041588   Integrase_H2C2       
IPR010999   Retrovr_matrix       
IPR000071   Lentvrl_matrix_N       
IPR000721   Gag_p24       
IPR008919   Retrov_capsid_N       
IPR008916   Retrov_capsid_C       
IPR012344   Matrix_HIV/RSV_N       
IPR014817   Gag_p6       
IPR010659   RVT_connect       
IPR036862   Integrase_C_dom_sf_retrovir       
IPR001969   Aspartic_peptidase_AS       
IPR003308   Integrase_Zn-bd_dom_N       
IPR001995   Peptidase_A2_cat       
IPR010661   RVT_thumb       
IPR002156   RNaseH_domain       
IPR018061   Retropepsins       
IPR001037   Integrase_C_retrovir       
IPR034170   Retropepsin-like_cat_dom       
IPR017856   Integrase-like_N       
SUPFAM
SSF57756   SSF57756        + More
SSF53098   SSF53098       
SSF47836   SSF47836       
SSF47943   SSF47943       
SSF50630   SSF50630       
SSF46919   SSF46919       
SSF50122   SSF50122       
PDB
5O2U     E-value=0.013994,     Score=83

Ontologies

Topology

Subcellular location
Virion  
Host nucleus  
Host cytoplasm  
Host cell membrane  
Host endosome   These locations are probably linked to virus assembly sites. The main location is the cell membrane, but under some circumstances, late endosomal compartments can serve as productive sites for virion assembly.   With evidence from 6 publications.
Host multivesicular body   These locations are probably linked to virus assembly sites. The main location is the cell membrane, but under some circumstances, late endosomal compartments can serve as productive sites for virion assembly.   With evidence from 6 publications.
Virion membrane  
Length:
127
Number of predicted TMHs:
0
Exp number of AAs in TMHs:
0
Exp number, first 60 AAs:
0
Total prob of N-in:
0.61470
inside
1  -  127
 
 

Population Genetic Test Statistics

Pi
334.83415
Theta
176.658444
Tajima's D
2.816878
CLR
0
CSRT
0.969201539923004
Interpretation
Uncertain

Multiple alignment of Orthologues

 
 

Gene Tree

 
 
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