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- PDB-8g6y: Structure of WT E.coli ribosome 50S subunit with complexed with m... -

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Entry
Database: PDB / ID: 8g6y
TitleStructure of WT E.coli ribosome 50S subunit with complexed with mRNA, P-site fMet-NH-tRNAfMet and A-site 3-aminopyridine-4-carboxylic acid charged NH-tRNAPhe
Components
  • (50S ribosomal protein ...) x 28
  • 23S rRNA23S ribosomal RNA
  • 5S rRNA5S ribosomal RNA
  • A-site tRNA Phe
  • P-site tRNA fMet
  • Ribosomal protein L21
  • mRNAMessenger RNA
KeywordsRIBOSOME / non-natural monomers / aminobenzoic acids / unnatural monomers
Function / homology
Function and homology information


negative regulation of cytoplasmic translational initiation / positive regulation of ribosome biogenesis / DnaA-L2 complex / translational initiation / negative regulation of DNA-templated DNA replication initiation / ribosome assembly / assembly of large subunit precursor of preribosome / cytosolic ribosome assembly / regulation of cell growth / ribosomal large subunit assembly ...negative regulation of cytoplasmic translational initiation / positive regulation of ribosome biogenesis / DnaA-L2 complex / translational initiation / negative regulation of DNA-templated DNA replication initiation / ribosome assembly / assembly of large subunit precursor of preribosome / cytosolic ribosome assembly / regulation of cell growth / ribosomal large subunit assembly / large ribosomal subunit / ribosome binding / large ribosomal subunit rRNA binding / 5S rRNA binding / transferase activity / cytoplasmic translation / cytosolic large ribosomal subunit / tRNA binding / rRNA binding / ribosome / structural constituent of ribosome / ribonucleoprotein complex / translation / response to antibiotic / RNA binding / zinc ion binding / cytosol / cytoplasm
Similarity search - Function
Ribosomal protein L25, short-form / Ribosomal protein L31 type A / Ribosomal protein L31 signature. / Ribosomal protein L31 / Ribosomal protein L31 superfamily / Ribosomal protein L31 / Ribosomal protein L21, conserved site / Ribosomal protein L21 signature. / Ribosomal protein L16 signature 1. / : ...Ribosomal protein L25, short-form / Ribosomal protein L31 type A / Ribosomal protein L31 signature. / Ribosomal protein L31 / Ribosomal protein L31 superfamily / Ribosomal protein L31 / Ribosomal protein L21, conserved site / Ribosomal protein L21 signature. / Ribosomal protein L16 signature 1. / : / Ribosomal protein L6, conserved site / Ribosomal protein L6 signature 1. / Ribosomal protein L16, conserved site / Ribosomal protein L16 signature 2. / Ribosomal protein L9 signature. / Ribosomal protein L17 signature. / Ribosomal protein L9, bacteria/chloroplast / Ribosomal protein L9, C-terminal / Ribosomal protein L9, C-terminal domain / Ribosomal protein L9, C-terminal domain superfamily / Ribosomal L25p family / Ribosomal protein L25 / Ribosomal protein L28/L24 superfamily / Ribosomal protein L36 signature. / Ribosomal protein L25/Gln-tRNA synthetase, N-terminal / Ribosomal protein L32p, bacterial type / Ribosomal protein L25/Gln-tRNA synthetase, anti-codon-binding domain superfamily / Ribosomal protein L9, N-terminal domain superfamily / Ribosomal protein L9 / Ribosomal protein L9, N-terminal / Ribosomal protein L9, N-terminal domain / Ribosomal protein L28 / Ribosomal protein L35, conserved site / Ribosomal protein L35 signature. / Ribosomal protein L33, conserved site / Ribosomal protein L33 signature. / Ribosomal protein L35, non-mitochondrial / Ribosomal protein L5, bacterial-type / Ribosomal protein L6, bacterial-type / Ribosomal protein L18, bacterial-type / Ribosomal protein L19, conserved site / Ribosomal protein L19 signature. / Ribosomal protein L36 / Ribosomal protein L36 superfamily / Ribosomal protein L36 / Ribosomal protein L9/RNase H1, N-terminal / Ribosomal protein L20 signature. / Ribosomal protein L27, conserved site / Ribosomal protein L27 signature. / Ribosomal protein L14P, bacterial-type / Ribosomal protein L34, conserved site / Ribosomal protein L34 signature. / Ribosomal protein L22, bacterial/chloroplast-type / Ribosomal protein L35 / Ribosomal protein L35 superfamily / Ribosomal protein L2, bacterial/organellar-type / Ribosomal protein L35 / Ribosomal L28 family / Ribosomal protein L33 / Ribosomal protein L33 / Ribosomal protein L28/L24 / Ribosomal protein L33 superfamily / Ribosomal protein L30, bacterial-type / : / Ribosomal protein L16 / Ribosomal protein L18 / Ribosomal L18 of archaea, bacteria, mitoch. and chloroplast / L28p-like / Ribosomal protein L20 / Ribosomal protein L20 / Ribosomal protein L20, C-terminal / Ribosomal protein L21 / Ribosomal protein L27 / Ribosomal L27 protein / Ribosomal protein L19 / Ribosomal protein L19 superfamily / Ribosomal protein L19 / Ribosomal proteins 50S L24/mitochondrial 39S L24 / Ribosomal protein L17 / Ribosomal protein L17 superfamily / Ribosomal protein L17 / Ribosomal protein L21-like / L21-like superfamily / Ribosomal prokaryotic L21 protein / Ribosomal L32p protein family / Ribosomal protein L24 / Ribosomal protein L32p / Ribosomal protein L34 / Ribosomal protein L34 / Ribosomal protein L13, bacterial-type / Ribosomal protein L23/L25, conserved site / Ribosomal protein L3, bacterial/organelle-type / Ribosomal protein L15, bacterial-type / 50S ribosomal protein uL4 / Ribosomal protein L23 signature. / Ribosomal protein L30, conserved site / Ribosomal protein L5, conserved site / Ribosomal protein L29, conserved site / Ribosomal protein L30 signature. / Ribosomal protein L15, conserved site
Similarity search - Domain/homology
Chem-8AN / N-FORMYLMETHIONINE / : / 3-aminopyridine-4-carboxamide / : / : / : / RNA / RNA (> 10) / RNA (> 100) ...Chem-8AN / N-FORMYLMETHIONINE / : / 3-aminopyridine-4-carboxamide / : / : / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Large ribosomal subunit protein uL15 / Large ribosomal subunit protein bL36 / Large ribosomal subunit protein bL28 / Large ribosomal subunit protein uL24 / Large ribosomal subunit protein bL17 / Large ribosomal subunit protein uL5 / Large ribosomal subunit protein uL23 / Large ribosomal subunit protein bL21 / 50S ribosomal protein L6 / 50S ribosomal protein L16 / Large ribosomal subunit protein uL4 / Large ribosomal subunit protein bL20 / Large ribosomal subunit protein bL34 / Large ribosomal subunit protein uL29 / Large ribosomal subunit protein bL25 / Large ribosomal subunit protein bL32 / Large ribosomal subunit protein uL18 / Large ribosomal subunit protein bL33 / Large ribosomal subunit protein bL27 / Large ribosomal subunit protein bL31 / Large ribosomal subunit protein bL35 / Large ribosomal subunit protein uL2 / Large ribosomal subunit protein uL22 / Large ribosomal subunit protein uL13 / Large ribosomal subunit protein uL14 / Large ribosomal subunit protein uL3 / Large ribosomal subunit protein bL19 / Large ribosomal subunit protein uL30 / Large ribosomal subunit protein bL9
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.09 Å
AuthorsMajumdar, C. / Cate, J.H.D.
Funding support United States, 1items
OrganizationGrant numberCountry
National Science Foundation (NSF, United States)CHE 2002182 United States
CitationJournal: ACS Cent Sci / Year: 2023
Title: Aminobenzoic Acid Derivatives Obstruct Induced Fit in the Catalytic Center of the Ribosome.
Authors: Chandrima Majumdar / Joshua A Walker / Matthew B Francis / Alanna Schepartz / Jamie H D Cate /
Abstract: The () ribosome can incorporate a variety of non-l-α-amino acid monomers into polypeptide chains but with poor efficiency. Although these monomers span a diverse set of compounds, there exists no ...The () ribosome can incorporate a variety of non-l-α-amino acid monomers into polypeptide chains but with poor efficiency. Although these monomers span a diverse set of compounds, there exists no high-resolution structural information regarding their positioning within the catalytic center of the ribosome, the peptidyl transferase center (PTC). Thus, details regarding the mechanism of amide bond formation and the structural basis for differences and defects in incorporation efficiency remain unknown. Within a set of three aminobenzoic acid derivatives-3-aminopyridine-4-carboxylic acid (Apy), aminobenzoic acid (ABZ), and aminobenzoic acid (ABZ)-the ribosome incorporates Apy into polypeptide chains with the highest efficiency, followed by ABZ and then ABZ, a trend that does not track with the nucleophilicity of the reactive amines. Here, we report high-resolution cryo-EM structures of the ribosome with each of these three aminobenzoic acid derivatives charged on tRNA bound in the aminoacyl-tRNA site (A-site). The structures reveal how the aromatic ring of each monomer sterically blocks the positioning of nucleotide U2506, thereby preventing rearrangement of nucleotide U2585 and the resulting induced fit in the PTC required for efficient amide bond formation. They also reveal disruptions to the bound water network that is believed to facilitate formation and breakdown of the tetrahedral intermediate. Together, the cryo-EM structures reported here provide a mechanistic rationale for differences in reactivity of aminobenzoic acid derivatives relative to l-α-amino acids and each other and identify stereochemical constraints on the size and geometry of non-monomers that can be accepted efficiently by wild-type ribosomes.
History
DepositionFeb 16, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Apr 5, 2023Provider: repository / Type: Initial release
Revision 1.1Oct 18, 2023Group: Data collection / Database references
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 2.0Nov 15, 2023Group: Atomic model / Data collection / Derived calculations
Category: atom_site / chem_comp_atom ...atom_site / chem_comp_atom / chem_comp_bond / struct_conn
Item: _atom_site.auth_atom_id / _atom_site.label_atom_id ..._atom_site.auth_atom_id / _atom_site.label_atom_id / _chem_comp_atom.atom_id / _chem_comp_bond.atom_id_1 / _chem_comp_bond.atom_id_2 / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.ptnr2_label_atom_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
0: 50S ribosomal protein L33
1: 50S ribosomal protein L34
2: 50S ribosomal protein L35
3: 50S ribosomal protein L36
4: 50S ribosomal protein L31
X: mRNA
Y: A-site tRNA Phe
Z: P-site tRNA fMet
a: 23S rRNA
b: 5S rRNA
c: 50S ribosomal protein L2
d: 50S ribosomal protein L3
e: 50S ribosomal protein L4
f: 50S ribosomal protein L5
g: 50S ribosomal protein L6
h: 50S ribosomal protein L9
i: 50S ribosomal protein L13
j: 50S ribosomal protein L14
k: 50S ribosomal protein L15
l: 50S ribosomal protein L16
m: 50S ribosomal protein L17
n: 50S ribosomal protein L18
o: 50S ribosomal protein L19
p: 50S ribosomal protein L20
q: Ribosomal protein L21
r: 50S ribosomal protein L22
s: 50S ribosomal protein L23
t: 50S ribosomal protein L24
u: 50S ribosomal protein L25
v: 50S ribosomal protein L27
w: 50S ribosomal protein L28
x: 50S ribosomal protein L29
y: 50S ribosomal protein L30
z: 50S ribosomal protein L32
hetero molecules


Theoretical massNumber of molelcules
Total (without water)1,415,808285
Polymers1,408,81634
Non-polymers6,992251
Water62,3323460
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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50S ribosomal protein ... , 28 types, 28 molecules 01234cdefghijklmnoprstuvwxyz

#1: Protein 50S ribosomal protein L33 /


Mass: 6388.631 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: F4NQ61
#2: Protein/peptide 50S ribosomal protein L34 /


Mass: 5397.463 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: B7MGC4
#3: Protein 50S ribosomal protein L35 / / Large ribosomal subunit protein bL35 / Ribosomal protein A


Mass: 7313.032 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: P0A7Q1
#4: Protein/peptide 50S ribosomal protein L36 /


Mass: 4377.390 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A0A0E2L017
#5: Protein 50S ribosomal protein L31 / / Large ribosomal subunit protein bL31-A


Mass: 7887.117 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: P0A7M9
#11: Protein 50S ribosomal protein L2 / / Large ribosomal subunit protein uL2


Mass: 29923.619 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: P60422
#12: Protein 50S ribosomal protein L3 /


Mass: 22291.562 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: U9Y9G2
#13: Protein 50S ribosomal protein L4 /


Mass: 22121.566 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A1AGK6
#14: Protein 50S ribosomal protein L5 /


Mass: 20333.611 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A0A829CFT8
#15: Protein 50S ribosomal protein L6 /


Mass: 18932.791 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A0A862ZNS7
#16: Protein 50S ribosomal protein L9 /


Mass: 15789.020 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: V0YZK9
#17: Protein 50S ribosomal protein L13 /


Mass: 16050.606 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: S1EW51
#18: Protein 50S ribosomal protein L14 /


Mass: 13565.067 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: S1NW45
#19: Protein 50S ribosomal protein L15 /


Mass: 15008.471 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A0A037Y8L6
#20: Protein 50S ribosomal protein L16 /


Mass: 15329.343 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A1AGK1
#21: Protein 50S ribosomal protein L17 /


Mass: 14393.657 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A0A1X3LC97
#22: Protein 50S ribosomal protein L18 /


Mass: 12794.668 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: E3PKY8
#23: Protein 50S ribosomal protein L19 /


Mass: 13159.278 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: V0AJX1
#24: Protein 50S ribosomal protein L20 /


Mass: 13528.024 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: B7MAS6
#26: Protein 50S ribosomal protein L22 / / Large ribosomal subunit protein uL22


Mass: 12253.359 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: P61175
#27: Protein 50S ribosomal protein L23 /


Mass: 11222.160 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A0A829CFV1
#28: Protein 50S ribosomal protein L24 /


Mass: 11339.250 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A0A1X3KWX7
#29: Protein 50S ribosomal protein L25 /


Mass: 10713.465 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7XH79
#30: Protein 50S ribosomal protein L27 / / Large ribosomal subunit protein bL27


Mass: 9146.540 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: P0A7L8
#31: Protein 50S ribosomal protein L28 /


Mass: 9027.551 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A0A1X3JA73
#32: Protein 50S ribosomal protein L29 /


Mass: 7286.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D6IEL0
#33: Protein 50S ribosomal protein L30 /


Mass: 6554.820 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: V0YKA9
#34: Protein 50S ribosomal protein L32 /


Mass: 6463.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: D7XI28

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RNA chain , 5 types, 5 molecules XYZab

#6: RNA chain mRNA / Messenger RNA


Mass: 9036.438 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Escherichia coli (E. coli)
#7: RNA chain A-site tRNA Phe


Mass: 24485.539 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Escherichia coli (E. coli) / References: GenBank: 1315725308
#8: RNA chain P-site tRNA fMet


Mass: 24513.604 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Escherichia coli (E. coli) / References: GenBank: 1804121330
#9: RNA chain 23S rRNA / 23S ribosomal RNA


Mass: 941811.562 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600
#10: RNA chain 5S rRNA / 5S ribosomal RNA


Mass: 38790.090 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: GenBank: 1273279017

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Protein , 1 types, 1 molecules q

#25: Protein Ribosomal protein L21 /


Mass: 11586.374 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / Strain: MRE600 / References: UniProt: A0A829CSJ4

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Non-polymers , 7 types, 3711 molecules

#35: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn
#36: Chemical ChemComp-YRW / 3-aminopyridine-4-carboxamide


Mass: 137.139 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C6H7N3O / Feature type: SUBJECT OF INVESTIGATION
#37: Chemical ChemComp-8AN / 3'-amino-3'-deoxyadenosine 5'-(dihydrogen phosphate)


Type: RNA linking / Mass: 346.236 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H15N6O6P
#38: Chemical ChemComp-FME / N-FORMYLMETHIONINE / N-Formylmethionine


Type: L-peptide linking / Mass: 177.221 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C6H11NO3S
#39: Chemical...
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 231 / Source method: obtained synthetically / Formula: Mg
#40: Chemical
ChemComp-K / POTASSIUM ION


Mass: 39.098 Da / Num. of mol.: 15 / Source method: obtained synthetically / Formula: K
#41: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 3460 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: 50S subunit of E.coli ribosome / Type: RIBOSOME / Entity ID: #1-#6, #9-#34 / Source: MULTIPLE SOURCES
Molecular weightExperimental value: NO
Source (natural)Organism: Escherichia coli (E. coli) / Strain: MRE600
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 1500 nm / Nominal defocus min: 500 nm
Image recordingElectron dose: 40 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.09 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 288552 / Symmetry type: POINT

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