Pre Gene Modal
BGIBMGA002957
Annotation
PREDICTED:_zinc_finger_CCHC_domain-containing_protein_13-like_[Bombyx_mori]
Full name
Gag polyprotein
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)
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
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
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
Population Genetic Test Statistics
Multiple alignment of Orthologues
Gene Tree