3LUJ - JenaLib

Asymmetric Unit (Jmol Viewer)

Asym. Unit - sites (Jmol Viewer)

Biological Unit 1 (Jmol Viewer)

Biol. Unit 1 - sites (Jmol Viewer)

Biological Unit 2 (Jmol Viewer)

Biological Unit 3 (Jmol Viewer)

Title :   CRYSTAL STRUCTURE OF MID DOMAIN FROM HAGO2 IN COMPLEX WITH UMP

Authors :   F. Frank, N. Sonenberg, B. Nagar

Date :   17 Feb 10 (Deposition) - 26 May 10 (Release) - 30 Jun 10 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   1.80

Chains :   Asym. Unit : A,B,C
Biol. Unit 1: A  (1x)
Biol. Unit 2: B  (1x)
Biol. Unit 3: C  (1x)

Keywords :   Mid Domain, Ribonucleoprotein, Rna-Binding, Rna-Mediated Gene Silencing, Translation Regulation, Rna Binding Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   F. Frank, N. Sonenberg, B. Nagar
Structural Basis For 5'-Nucleotide Base-Specific Recognition Of Guide Rna By Human Ago2.
Nature V. 465 818 2010
PubMed-ID: 20505670 | Reference-DOI: 10.1038/NATURE09039

Molecule 1 - PROTEIN ARGONAUTE-2
	Chains	:	A, B, C
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Taxid	:	562
	Fragment	:	MID DOMAIN
	Gene	:	EIF2C2, AGO2
	Organism Common	:	HUMAN
	Organism Scientific	:	HOMO SAPIENS
	Organism Taxid	:	9606
	Synonym	:	ARGONAUTE2, HAGO2, PROTEIN SLICER, PAZ PIWI DOMAIN PROTEIN, PPD, EUKARYOTIC TRANSLATION INITIATION FACTOR 2C 2, EIF-2C 2, EIF2C 2

		1	2	3
Asymmetric Unit	:	A	B	C
Biological Unit 1 (1x)	:	A
Biological Unit 2 (1x)	:		B
Biological Unit 3 (1x)	:			C

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (1, 3)

No.	Name	Count	Type	Full Name
1	U5P	3	Ligand/Ion	URIDINE-5'-MONOPHOSPHATE

Biological Unit 1 (1, 1)

No.	Name	Count	Type	Full Name
1	U5P	1	Ligand/Ion	URIDINE-5'-MONOPHOSPHATE

Biological Unit 2 (1, 1)

No.	Name	Count	Type	Full Name
1	U5P	1	Ligand/Ion	URIDINE-5'-MONOPHOSPHATE

Biological Unit 3 (1, 1)

No.	Name	Count	Type	Full Name
1	U5P	1	Ligand/Ion	URIDINE-5'-MONOPHOSPHATE

Asymmetric Unit (3, 3)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	HOH A:103 , HOH A:107 , HOH A:186 , HOH A:267 , LEU A:522 , GLY A:524 , LYS A:525 , THR A:526 , TYR A:529 , LYS A:533 , THR A:544 , GLN A:545 , CYS A:546 , GLN A:548 , LYS A:570	BINDING SITE FOR RESIDUE U5P A 1
2	AC2	SOFTWARE	HOH B:108 , HOH B:111 , HOH B:118 , HOH B:119 , HOH B:126 , HOH B:313 , LEU B:522 , GLY B:524 , LYS B:525 , THR B:526 , TYR B:529 , LYS B:533 , THR B:544 , GLN B:545 , CYS B:546 , GLN B:548 , LYS B:570	BINDING SITE FOR RESIDUE U5P B 1
3	AC3	SOFTWARE	HOH C:141 , HOH C:178 , HOH C:251 , LEU C:522 , GLY C:524 , LYS C:525 , THR C:526 , TYR C:529 , LYS C:533 , THR C:544 , GLN C:545 , CYS C:546 , GLN C:548 , LYS C:566 , LYS C:570	BINDING SITE FOR RESIDUE U5P C 1

(no "SS Bond" information available for 3LUJ)

(no "Cis Peptide Bond" information available for 3LUJ)

(no "SAP(SNP)/Variant" information available for 3LUJ)

Asymmetric Unit (1, 3)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	PIWI	PS50822	Piwi domain profile.	AGO2_HUMAN	517-818	3	A:517-573 B:517-572 C:517-572

Biological Unit 1 (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	PIWI	PS50822	Piwi domain profile.	AGO2_HUMAN	517-818	1	A:517-573 - -

Biological Unit 2 (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	PIWI	PS50822	Piwi domain profile.	AGO2_HUMAN	517-818	1	- B:517-572 -

Biological Unit 3 (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	PIWI	PS50822	Piwi domain profile.	AGO2_HUMAN	517-818	1	- - C:517-572

(no "Exon" information available for 3LUJ)

Asymmetric Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
	Number of residues per labelling interval =
	UniProt sequence: complete aligned part

Show mapping:	SCOP domains	CATH domains	Pfam domains	Secondary structure (by author)
	SAPs(SNPs)	PROSITE motifs	Exons
	(details for a mapped element are shown in a popup box when the mouse pointer rests over it)

Chain A from PDB  Type:PROTEIN  Length:134
 aligned with AGO2_HUMAN | Q9UKV8 from UniProtKB/Swiss-Prot  Length:859

    Alignment length:134
                                   449       459       469       479       489       499       509       519       529       539       549       559       569    
           AGO2_HUMAN   440 KQFHTGIEIKVWAIACFAPQRQCTEVHLKSFTEQLRKISRDAGMPIQGQPCFCKYAQGADSVEPMFRHLKNTYAGLQLVVVILPGKTPVYAEVKRVGDTVLGMATQCVQMKNVQRTTPQTLSNLCLKINVKLGG 573
               SCOP domains -------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains -------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...........eeeee.......hhhhhhhhhhhhhhhhhhhh........eeee..hhhhhhhhhhhhhhhh....eeeeee....hhhhhhhhhhhhh....eeeeehhhhhh.hhhhhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -----------------------------------------------------------------------------PIWI  PDB: A:517-573 UniProt: 517-818                     PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3luj A 440 KQFHTGIEIKVWAIACFAPQRQCTEVHLKSFTEQLRKISRDAGMPIQGQPCFCKYAQGADSVEPMFRHLKNTYAGLQLVVVILPGKTPVYAEVKRVGDTVLGMATQCVQMKNVQRTTPQTLSNLCLKINVKLGG 573
                                   449       459       469       479       489       499       509       519       529       539       549       559       569

Chain B from PDB  Type:PROTEIN  Length:133
 aligned with AGO2_HUMAN | Q9UKV8 from UniProtKB/Swiss-Prot  Length:859

    Alignment length:133
                                   449       459       469       479       489       499       509       519       529       539       549       559       569   
           AGO2_HUMAN   440 KQFHTGIEIKVWAIACFAPQRQCTEVHLKSFTEQLRKISRDAGMPIQGQPCFCKYAQGADSVEPMFRHLKNTYAGLQLVVVILPGKTPVYAEVKRVGDTVLGMATQCVQMKNVQRTTPQTLSNLCLKINVKLG 572
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...........eeeee.......hhhhhhhhhhhhhhhhhhh.........eeee..hhhhhhhhhhhhhhhh....eeeeee....hhhhhhhhhhhhh....eeeeehhhhhh.hhhhhhhhhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -----------------------------------------------------------------------------PIWI  PDB: B:517-572 UniProt: 517-818                    PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3luj B 440 KQFHTGIEIKVWAIACFAPQRQCTEVHLKSFTEQLRKISRDAGMPIQGQPCFCKYAQGADSVEPMFRHLKNTYAGLQLVVVILPGKTPVYAEVKRVGDTVLGMATQCVQMKNVQRTTPQTLSNLCLKINVKLG 572
                                   449       459       469       479       489       499       509       519       529       539       549       559       569

Chain C from PDB  Type:PROTEIN  Length:132
 aligned with AGO2_HUMAN | Q9UKV8 from UniProtKB/Swiss-Prot  Length:859

    Alignment length:132
                                   450       460       470       480       490       500       510       520       530       540       550       560       570  
           AGO2_HUMAN   441 QFHTGIEIKVWAIACFAPQRQCTEVHLKSFTEQLRKISRDAGMPIQGQPCFCKYAQGADSVEPMFRHLKNTYAGLQLVVVILPGKTPVYAEVKRVGDTVLGMATQCVQMKNVQRTTPQTLSNLCLKINVKLG 572
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------ SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------ CATH domains
           Pfam domains (1) ----------------------------------------------------------------------------Piwi-3lujC01 C:517-572                                   Pfam domains (1)
           Pfam domains (2) ----------------------------------------------------------------------------Piwi-3lujC02 C:517-572                                   Pfam domains (2)
           Pfam domains (3) ----------------------------------------------------------------------------Piwi-3lujC03 C:517-572                                   Pfam domains (3)
         Sec.struct. author ..........eeeee.......hhhhhhhhhhhhhhhhhhh.........eeee..hhhhhhhhhhhhhhhh....eeeeee....hhhhhhhhhhhh.....eeeeehhhhhh.hhhhhhhhhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------PIWI  PDB: C:517-572 UniProt: 517-818                    PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 3luj C 441 QFHTGIEIKVWAIACFAPQRQCTEVHLKSFTEQLRKISRDAGMPIQGQPCFCKYAQGADSVEPMFRHLKNTYAGLQLVVVILPGKTPVYAEVKRVGDTVLGMATQCVQMKNVQRTTPQTLSNLCLKINVKLG 572
                                   450       460       470       480       490       500       510       520       530       540       550       560       570

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	x	→ Chemical Group	(purple background, 'x', labelled with number + name, e.g. ACE or NH2)
	extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '\|'

(no "SCOP Domain" information available for 3LUJ)

(no "CATH Domain" information available for 3LUJ)

Asymmetric Unit

Clans(

)

Families(

)

Organisms( (-)

)

Clan: RNase_H (288)

Family: Piwi (16)

Homo sapiens (Human) (8)

1a	Piwi-3lujC01	C:517-572
1b	Piwi-3lujC02	C:517-572
1c	Piwi-3lujC03	C:517-572

Asymmetric Unit(hide GO term definitions)

Chain A,B,C (AGO2_HUMAN | Q9UKV8)

molecular function
	GO:0000340	RNA 7-methylguanosine cap binding	Interacting selectively and non-covalently with the 7-methylguanosine group added cotranscriptionally to the 5' end of RNA molecules transcribed by polymerase II.
	GO:0003723	RNA binding	Interacting selectively and non-covalently with an RNA molecule or a portion thereof.
	GO:0000993	RNA polymerase II core binding	Interacting selectively and non-covalently with RNA polymerase II core enzyme, a multisubunit eukaryotic nuclear RNA polymerase typically composed of twelve subunits.
	GO:0001047	core promoter binding	Interacting selectively and non-covalently with the regulatory region composed of the transcription start site and binding sites for the basal transcription machinery. Binding may occur as a sequence specific interaction or as an interaction observed only once a factor has been recruited to the DNA by other factors.
	GO:0003725	double-stranded RNA binding	Interacting selectively and non-covalently with double-stranded RNA.
	GO:0004519	endonuclease activity	Catalysis of the hydrolysis of ester linkages within nucleic acids by creating internal breaks.
	GO:0004521	endoribonuclease activity	Catalysis of the hydrolysis of ester linkages within ribonucleic acid by creating internal breaks.
	GO:0090624	endoribonuclease activity, cleaving miRNA-paired mRNA	Catalysis of the endonucleolytic cleavage of the mRNA in a double-stranded RNA molecule formed by the base pairing of an mRNA with an miRNA.
	GO:0070551	endoribonuclease activity, cleaving siRNA-paired mRNA	Catalysis of the endonucleolytic cleavage of the mRNA in a double-stranded RNA molecule formed by the base pairing of an mRNA with an siRNA, yielding 5'-phosphomonoesters.
	GO:0016891	endoribonuclease activity, producing 5'-phosphomonoesters	Catalysis of the hydrolysis of ester linkages within ribonucleic acids by creating internal breaks to yield 5'-phosphomonoesters.
	GO:0016787	hydrolase activity	Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
	GO:0003729	mRNA binding	Interacting selectively and non-covalently with messenger RNA (mRNA), an intermediate molecule between DNA and protein. mRNA includes UTR and coding sequences, but does not contain introns.
	GO:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
	GO:0035198	miRNA binding	Interacting selectively and non-covalently with a microRNA, a 21-23 nucleotide RNA that is processed from a stem-loop RNA precursor (pre-miRNA) that is encoded within plant and animal genomes.
	GO:0004518	nuclease activity	Catalysis of the hydrolysis of ester linkages within nucleic acids.
	GO:0003676	nucleic acid binding	Interacting selectively and non-covalently with any nucleic acid.
	GO:0008022	protein C-terminus binding	Interacting selectively and non-covalently with a protein C-terminus, the end of any peptide chain at which the 1-carboxy function of a constituent amino acid is not attached in peptide linkage to another amino-acid residue.
	GO:0005515	protein binding	Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
	GO:0035197	siRNA binding	Interacting selectively and non-covalently with a small interfering RNA, a 21-23 nucleotide RNA that is processed from double stranded RNA (dsRNA) by an RNAse enzyme.
	GO:0003727	single-stranded RNA binding	Interacting selectively and non-covalently with single-stranded RNA.
	GO:0003743	translation initiation factor activity	Functions in the initiation of ribosome-mediated translation of mRNA into a polypeptide.
biological process
	GO:0090502	RNA phosphodiester bond hydrolysis, endonucleolytic	The chemical reactions and pathways involving the hydrolysis of internal 3',5'-phosphodiester bonds in one or two strands of ribonucleotides.
	GO:0010501	RNA secondary structure unwinding	The process in which a secondary structure of RNA are broken or 'melted'.
	GO:0007223	Wnt signaling pathway, calcium modulating pathway	The series of molecular signals initiated by binding of a Wnt protein to a receptor on the surface of the target cell where activated receptors leads to an increase in intracellular calcium and activation of protein kinase C (PKC).
	GO:0031047	gene silencing by RNA	Any process in which RNA molecules inactivate expression of target genes.
	GO:0035279	mRNA cleavage involved in gene silencing by miRNA	The process in which microRNAs (miRNAs) direct the cleavage of target mRNAs. Once incorporated into a RNA-induced silencing complex (RISC), a miRNA base pairing with near-perfect complementarity to the target mRNA will typically direct targeted endonucleolytic cleavage of the mRNA. Many plant miRNAs downregulate gene expression through this mechanism.
	GO:0090625	mRNA cleavage involved in gene silencing by siRNA	The process in which small interfering RNAs (siRNAs) direct the cleavage of target mRNAs. Once incorporated into a RNA-induced silencing complex (RISC), a siRNA will typically direct cleavage by base pairing with perfect or near-perfect complementarity to the target mRNA.
	GO:0035280	miRNA loading onto RISC involved in gene silencing by miRNA	The transfer of a microRNA (miRNA) strand from a miRNA:miRNA duplex onto the RNA-initiated silencing complex (RISC).
	GO:0035278	miRNA mediated inhibition of translation	The process in which microRNAs (miRNAs) block the translation of target mRNAs into proteins. Once incorporated into a RNA-induced silencing complex (RISC), a miRNA will typically mediate repression of translation if the miRNA imperfectly base-pairs with the 3' untranslated regions of target mRNAs
	GO:0010586	miRNA metabolic process	The chemical reactions and pathways involving miRNA, microRNA, a class of single-stranded RNA molecules of about 21-23 nucleotides in length, which regulates gene expression.
	GO:0045947	negative regulation of translational initiation	Any process that stops, prevents, or reduces the frequency, rate or extent of translational initiation.
	GO:0048015	phosphatidylinositol-mediated signaling	A series of molecular signals in which a cell uses a phosphatidylinositol-mediated signaling to convert a signal into a response. Phosphatidylinositols include phosphatidylinositol (PtdIns) and its phosphorylated derivatives.
	GO:0010628	positive regulation of gene expression	Any process that increases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product or products (proteins or RNA). This includes the production of an RNA transcript as well as any processing to produce a mature RNA product or an mRNA or circRNA (for protein-coding genes) and the translation of that mRNA or circRNA into protein. Protein maturation is included when required to form an active form of a product from an inactive precursor form.
	GO:1900153	positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay	Any process that activates or increases the frequency, rate or extent of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay.
	GO:0060213	positive regulation of nuclear-transcribed mRNA poly(A) tail shortening	Any process that increases the frequency, rate or extent of poly(A) tail shortening of a nuclear-transcribed mRNA. Poly(A) tail shortening is the decrease in length of the poly(A) tail of an mRNA from full length to an oligo(A) length.
	GO:0045944	positive regulation of transcription from RNA polymerase II promoter	Any process that activates or increases the frequency, rate or extent of transcription from an RNA polymerase II promoter.
	GO:0009791	post-embryonic development	The process whose specific outcome is the progression of the organism over time, from the completion of embryonic development to the mature structure. See embryonic development.
	GO:0035194	posttranscriptional gene silencing by RNA	Any process of posttranscriptional gene inactivation (silencing) mediated by small RNA molecules that may trigger mRNA degradation or negatively regulate translation.
	GO:0031054	pre-miRNA processing	Any process involved in the conversion of a pre-microRNA transcript into a mature microRNA molecule.
	GO:0035196	production of miRNAs involved in gene silencing by miRNA	Cleavage of stem-loop RNA precursors into microRNAs (miRNAs), a class of small RNAs that primarily silence genes by blocking the translation of mRNA transcripts into protein.
	GO:0006355	regulation of transcription, DNA-templated	Any process that modulates the frequency, rate or extent of cellular DNA-templated transcription.
	GO:0006417	regulation of translation	Any process that modulates the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of proteins by the translation of mRNA or circRNA.
	GO:0035087	siRNA loading onto RISC involved in RNA interference	The transfer of small interfering RNA molecules (siRNAs) from the Dicer family of enzymes that cleave the double-stranded RNA, onto the nuclease-containing RNA-initiated silencing complex (RISC), in the context of RNA interference.
	GO:0006351	transcription, DNA-templated	The cellular synthesis of RNA on a template of DNA.
	GO:0006412	translation	The cellular metabolic process in which a protein is formed, using the sequence of a mature mRNA or circRNA molecule to specify the sequence of amino acids in a polypeptide chain. Translation is mediated by the ribosome, and begins with the formation of a ternary complex between aminoacylated initiator methionine tRNA, GTP, and initiation factor 2, which subsequently associates with the small subunit of the ribosome and an mRNA or circRNA. Translation ends with the release of a polypeptide chain from the ribosome.
	GO:0006413	translational initiation	The process preceding formation of the peptide bond between the first two amino acids of a protein. This includes the formation of a complex of the ribosome, mRNA or circRNA, and an initiation complex that contains the first aminoacyl-tRNA.
cellular component
	GO:0000932	P-body	A focus in the cytoplasm where mRNAs may become inactivated by decapping or some other mechanism. Protein and RNA localized to these foci are involved in mRNA degradation, nonsense-mediated mRNA decay (NMD), translational repression, and RNA-mediated gene silencing.
	GO:0016442	RISC complex	A ribonucleoprotein complex that contains members of the Argonaute family of proteins, small interfering RNAs (siRNAs) or microRNAs (miRNAs), and miRNA or siRNA-complementary mRNAs, in addition to a number of accessory factors. The RISC complex is involved in posttranscriptional repression of gene expression through downregulation of translation or induction of mRNA degradation.
	GO:0070578	RISC-loading complex	A trimeric protein complex required for the formation of a mature RNA-induced silencing complex (RISC). In humans the complex is composed of the endonuclease Dicer (DICER1), TRBP (TARBP2) and the Argonaute protein Ago2 (EIF2C2/AGO2). Within the complex, Dicer and TRBP are required to process precursor miRNAs (pre-miRNAs) to mature miRNAs and then load them onto Ago2. Ago2 bound to the mature miRNA constitutes the minimal RISC and may subsequently dissociate from Dicer and TRBP. This complex has endoribonuclease activity.
	GO:0005737	cytoplasm	All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
	GO:0005829	cytosol	The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
	GO:0030425	dendrite	A neuron projection that has a short, tapering, often branched, morphology, receives and integrates signals from other neurons or from sensory stimuli, and conducts a nerve impulse towards the axon or the cell body. In most neurons, the impulse is conveyed from dendrites to axon via the cell body, but in some types of unipolar neuron, the impulse does not travel via the cell body.
	GO:0030529	intracellular ribonucleoprotein complex	An intracellular macromolecular complex containing both protein and RNA molecules.
	GO:0005845	mRNA cap binding complex	Any protein complex that binds to an mRNA cap at any time in the lifetime of the mRNA.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0035068	micro-ribonucleoprotein complex	A complex containing both protein and micro-RNA (miRNA) molecules. miRNAs are approximately 22 nucleotide noncoding RNAs derived from endogenous genes; they are processed from the stem of a longer hairpin like structure termed a pre-miRNA.
	GO:0005654	nucleoplasm	That part of the nuclear content other than the chromosomes or the nucleolus.
	GO:0005634	nucleus	A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
	GO:0005844	polysome	A multiribosomal structure representing a linear array of ribosomes held together by messenger RNA. They represent the active complexes in cellular protein synthesis and are able to incorporate amino acids into polypeptides both in vivo and in vitro.

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	3luj
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Description

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Ligands, Modified Residues, Ions (1, 3)

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