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UniProtKB - P0DOY8 (RL6_THET8)
Protein
50S ribosomal protein L6
Gene
rplF
Organism
Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8)
Status
Functioni
This protein binds to the 23S rRNA, and is important in its secondary structure. It is located near the subunit interface in the base of the L7/L12 stalk, and near the tRNA binding site of the peptidyltransferase center.
GO - Molecular functioni
- rRNA binding Source: UniProtKB-UniRule
- structural constituent of ribosome Source: InterPro
GO - Biological processi
- translation Source: UniProtKB-UniRule
Keywordsi
Molecular function | Ribonucleoprotein, Ribosomal protein, RNA-binding, rRNA-binding |
Names & Taxonomyi
Protein namesi | Recommended name: 50S ribosomal protein L6UniRule annotation |
Gene namesi | Name:rplFUniRule annotation Ordered Locus Names:TTHA1677 |
Organismi | Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8) |
Taxonomic identifieri | 300852 [NCBI] |
Taxonomic lineagei | Bacteria › Deinococcus-Thermus › Deinococci › Thermales › Thermaceae › Thermus › |
Proteomesi |
|
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Initiator methioninei | Removed1 Publication | |||
ChainiPRO_0000131072 | 2 – 180 | 50S ribosomal protein L6Add BLAST | 179 |
Interactioni
Subunit structurei
Part of the 50S ribosomal subunit.
Protein-protein interaction databases
IntActi | P0DOY8, 6 interactors |
STRINGi | 300852.55773059 |
Structurei
Secondary structure
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details3D structure databases
AlphaFoldDBi | P0DOY8 |
SMRi | P0DOY8 |
ModBasei | Search... |
PDBe-KBi | Search... |
Family & Domainsi
Sequence similaritiesi
Belongs to the universal ribosomal protein uL6 family.UniRule annotation
Phylogenomic databases
eggNOGi | COG0097, Bacteria |
HOGENOMi | CLU_065464_1_2_0 |
OMAi | KPDPYKG |
Family and domain databases
Gene3Di | 3.90.930.12, 2 hits |
HAMAPi | MF_01365_B, Ribosomal_L6_B, 1 hit |
InterProi | View protein in InterPro IPR000702, Ribosomal_L6 IPR020040, Ribosomal_L6_a/b-dom IPR036789, Ribosomal_L6_a/b-dom_sf IPR019906, Ribosomal_L6_bac-type |
PANTHERi | PTHR11655, PTHR11655, 1 hit PTHR11655:SF14, PTHR11655:SF14, 1 hit |
Pfami | View protein in Pfam PF00347, Ribosomal_L6, 2 hits |
PIRSFi | PIRSF002162, Ribosomal_L6, 1 hit |
PRINTSi | PR00059, RIBOSOMALL6 |
SUPFAMi | SSF56053, SSF56053, 2 hits |
TIGRFAMsi | TIGR03654, L6_bact, 1 hit |
i Sequence
Sequence statusi: Complete.
: The displayed sequence is further processed into a mature form. Sequence processingi
P0DOY8-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MSRIGRLPIP VPKGVSVEVA PGRVKVKGPK GELEVPVSPE MRVVVEEGVV
60 70 80 90 100
RVERPSDERR HKSLHGLTRT LIANAVKGVS EGYSKELLIK GIGYRARLVG
110 120 130 140 150
RALELTVGFS HPVVVEPPEG ITFEVPEPTR VRVSGIDKQK VGQVAANIRA
160 170 180
IRKPSAYHEK GIYYAGEPVR LKPGKAGAKK
Experimental Info
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sequence conflicti | 19 – 20 | VA → AV AA sequence (PubMed:11154066).Curated | 2 | |
Sequence conflicti | 25 | K → L AA sequence (PubMed:11154066).Curated | 1 | |
Sequence conflicti | 27 | K → Y AA sequence (PubMed:11154066).Curated | 1 |
Mass spectrometryi
Molecular mass is 19401 Da. Determined by MALDI. 1 Publication
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AP008226 Genomic DNA Translation: BAD71500.1 |
PIRi | S15442 |
RefSeqi | WP_011173704.1, NC_006461.1 YP_144943.1, NC_006461.1 |
Genome annotation databases
EnsemblBacteriai | BAD71500; BAD71500; BAD71500 |
GeneIDi | 3169807 |
KEGGi | ttj:TTHA1677 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AP008226 Genomic DNA Translation: BAD71500.1 |
PIRi | S15442 |
RefSeqi | WP_011173704.1, NC_006461.1 YP_144943.1, NC_006461.1 |
3D structure databases
Select the link destinations: PDBei RCSB PDBi PDBji Links Updated | PDB entry | Method | Resolution (Å) | Chain | Positions | PDBsum |
1VVJ | X-ray | 3.44 | RH/YH | 1-180 | [»] | |
1VY4 | X-ray | 2.60 | BH/DH | 1-180 | [»] | |
1VY5 | X-ray | 2.55 | BH/DH | 1-180 | [»] | |
1VY6 | X-ray | 2.90 | BH/DH | 1-180 | [»] | |
1VY7 | X-ray | 2.80 | BH/DH | 1-180 | [»] | |
4L47 | X-ray | 3.22 | RH/YH | 1-180 | [»] | |
4L71 | X-ray | 3.90 | RH/YH | 1-180 | [»] | |
4LEL | X-ray | 3.90 | RH/YH | 1-180 | [»] | |
4LFZ | X-ray | 3.92 | RH/YH | 1-180 | [»] | |
4LNT | X-ray | 2.94 | RH/YH | 1-180 | [»] | |
4LSK | X-ray | 3.48 | RH/YH | 1-180 | [»] | |
4LT8 | X-ray | 3.14 | RH/YH | 1-180 | [»] | |
4P6F | X-ray | 3.60 | RH/YH | 1-180 | [»] | |
4P70 | X-ray | 3.68 | RH/YH | 1-180 | [»] | |
4TUA | X-ray | 3.60 | RH/YH | 1-180 | [»] | |
4TUB | X-ray | 3.60 | RH/YH | 1-180 | [»] | |
4TUC | X-ray | 3.60 | RH/YH | 1-180 | [»] | |
4TUD | X-ray | 3.60 | RH/YH | 1-180 | [»] | |
4TUE | X-ray | 3.50 | RH/YH | 1-180 | [»] | |
4V42 | X-ray | 5.50 | BH | 26-177 | [»] | |
4V4P | X-ray | 5.50 | H | 24-177 | [»] | |
4V4X | X-ray | 5.00 | BH | 1-180 | [»] | |
4V4Y | X-ray | 5.50 | BH | 1-180 | [»] | |
4V4Z | X-ray | 4.51 | BH | 1-180 | [»] | |
4V51 | X-ray | 2.80 | BH/DH | 2-180 | [»] | |
4V5A | X-ray | 3.50 | BH/DH | 2-180 | [»] | |
4V5C | X-ray | 3.30 | BH/DH | 1-180 | [»] | |
4V5D | X-ray | 3.50 | BH/DH | 1-180 | [»] | |
4V5E | X-ray | 3.45 | BH/DH | 1-180 | [»] | |
4V5F | X-ray | 3.60 | BH/DH | 1-180 | [»] | |
4V5G | X-ray | 3.60 | BH/DH | 1-180 | [»] | |
4V5J | X-ray | 3.10 | BH/DH | 1-180 | [»] | |
4V5K | X-ray | 3.20 | BH/DH | 1-180 | [»] | |
4V5L | X-ray | 3.10 | BH | 1-180 | [»] | |
4V5M | electron microscopy | 7.80 | BH | 1-180 | [»] | |
4V5N | electron microscopy | 7.60 | BH | 1-180 | [»] | |
4V5P | X-ray | 3.10 | BH/DH | 1-180 | [»] | |
4V5Q | X-ray | 3.10 | BH/DH | 1-180 | [»] | |
4V5R | X-ray | 3.10 | BH/DH | 1-180 | [»] | |
4V5S | X-ray | 3.10 | BH/DH | 1-180 | [»] | |
4V68 | electron microscopy | 6.40 | BH | 12-171 | [»] | |
4V6A | X-ray | 3.10 | BH/DH | 1-180 | [»] | |
4V6F | X-ray | 3.10 | AH/DH | 1-180 | [»] | |
4V6G | X-ray | 3.50 | BH/DH | 1-180 | [»] | |
4V7J | X-ray | 3.30 | AH/BH | 1-180 | [»] | |
4V7K | X-ray | 3.60 | AH/BH | 1-180 | [»] | |
4V7L | X-ray | 3.00 | BH/DH | 1-180 | [»] | |
4V7M | X-ray | 3.45 | BH/DH | 1-180 | [»] | |
4V7W | X-ray | 3.00 | BH/DH | 1-180 | [»] | |
4V7X | X-ray | 3.00 | BH/DH | 1-180 | [»] | |
4V7Y | X-ray | 3.00 | BH/DH | 1-180 | [»] | |
4V7Z | X-ray | 3.10 | BH/DH | 1-180 | [»] | |
4V87 | X-ray | 3.10 | AH/DH | 2-171 | [»] | |
4V8A | X-ray | 3.20 | AH/BH | 1-180 | [»] | |
4V8B | X-ray | 3.00 | BH/DH | 1-180 | [»] | |
4V8C | X-ray | 3.30 | AH/BH | 1-180 | [»] | |
4V8D | X-ray | 3.00 | BH/DH | 1-180 | [»] | |
4V8E | X-ray | 3.30 | AH/CH | 1-180 | [»] | |
4V8F | X-ray | 3.30 | AH/DH | 1-180 | [»] | |
4V8G | X-ray | 3.00 | BH/DH | 1-180 | [»] | |
4V8H | X-ray | 3.10 | BH/DH | 1-180 | [»] | |
4V8I | X-ray | 2.70 | BH/DH | 1-180 | [»] | |
4V8J | X-ray | 3.90 | BH/DH | 1-180 | [»] | |
4V8N | X-ray | 3.10 | BH/DH | 1-180 | [»] | |
4V8O | X-ray | 3.80 | BH | 1-180 | [»] | |
4V8Q | X-ray | 3.10 | AH | 1-180 | [»] | |
4V8U | X-ray | 3.70 | BH/DH | 1-180 | [»] | |
4V8X | X-ray | 3.35 | BH/DH | 1-180 | [»] | |
4V90 | X-ray | 2.95 | BH | 1-180 | [»] | |
4V95 | X-ray | 3.20 | BH/DH | 1-180 | [»] | |
4V97 | X-ray | 3.52 | BH/DH | 1-180 | [»] | |
4V9A | X-ray | 3.30 | BH/DH | 1-180 | [»] | |
4V9B | X-ray | 3.10 | BH/DH | 1-180 | [»] | |
4V9H | X-ray | 2.86 | BH | 1-180 | [»] | |
4V9I | X-ray | 3.30 | BH/DH | 12-170 | [»] | |
4V9R | X-ray | 3.00 | BH/DH | 1-180 | [»] | |
4V9S | X-ray | 3.10 | BH/DH | 1-180 | [»] | |
4W2E | X-ray | 2.90 | H | 1-180 | [»] | |
4W2F | X-ray | 2.40 | BH/DH | 1-180 | [»] | |
4W2G | X-ray | 2.55 | BH/DH | 1-180 | [»] | |
4W2H | X-ray | 2.70 | BH/DH | 1-180 | [»] | |
4W2I | X-ray | 2.70 | BH/DH | 1-180 | [»] | |
4W4G | X-ray | 3.30 | RH/YH | 1-180 | [»] | |
4WPO | X-ray | 2.80 | AH/CH | 1-180 | [»] | |
4WQ1 | X-ray | 3.10 | 51/59 | 1-180 | [»] | |
4WQF | X-ray | 2.80 | AH/CH | 1-180 | [»] | |
4WQR | X-ray | 3.15 | 51/59 | 1-180 | [»] | |
4WQU | X-ray | 2.80 | AH/CH | 1-180 | [»] | |
4WQY | X-ray | 2.80 | AH/CH | 1-180 | [»] | |
4WR6 | X-ray | 3.05 | 51/59 | 1-180 | [»] | |
4WRA | X-ray | 3.05 | 51/59 | 1-180 | [»] | |
4WRO | X-ray | 3.05 | 51 | 1-180 | [»] | |
4WSD | X-ray | 2.95 | 51/59 | 1-180 | [»] | |
4WSM | X-ray | 3.30 | 51/59 | 1-180 | [»] | |
4WT1 | X-ray | 3.05 | 51/59 | 1-180 | [»] | |
4WT8 | X-ray | 3.40 | CF/DF | 12-170 | [»] | |
4WU1 | X-ray | 3.20 | 51/59 | 1-180 | [»] | |
4WZD | X-ray | 3.10 | 51/59 | 1-180 | [»] | |
4WZO | X-ray | 3.30 | 51/59 | 1-180 | [»] | |
4Y4O | X-ray | 2.30 | 1H/2H | 1-180 | [»] | |
4Y4P | X-ray | 2.50 | 1H/2H | 1-180 | [»] | |
4YPB | X-ray | 3.40 | RH/YH | 1-180 | [»] | |
4YZV | X-ray | 3.10 | RH/YH | 1-180 | [»] | |
4Z3S | X-ray | 2.65 | 1H/2H | 1-180 | [»] | |
4Z8C | X-ray | 2.90 | 1H/2H | 1-180 | [»] | |
4ZER | X-ray | 3.10 | 1H/2H | 2-175 | [»] | |
4ZSN | X-ray | 3.60 | RH/YH | 1-180 | [»] | |
5A9Z | electron microscopy | 4.70 | AH | 4-177 | [»] | |
5AA0 | electron microscopy | 5.00 | AH | 4-177 | [»] | |
5CZP | X-ray | 3.30 | RH/YH | 1-180 | [»] | |
5D8B | X-ray | 3.63 | AB/E | 1-180 | [»] | |
5DFE | X-ray | 3.10 | RH/YH | 1-180 | [»] | |
5DOX | X-ray | 3.10 | 1H/2H | 1-180 | [»] | |
5DOY | X-ray | 2.60 | 1H/2H | 1-180 | [»] | |
5E7K | X-ray | 3.20 | 51/59 | 1-180 | [»] | |
5E81 | X-ray | 2.95 | 51/59 | 1-180 | [»] | |
5EL4 | X-ray | 3.15 | 51/59 | 1-180 | [»] | |
5EL5 | X-ray | 3.15 | 51/59 | 1-180 | [»] | |
5EL6 | X-ray | 3.10 | 51/59 | 1-180 | [»] | |
5EL7 | X-ray | 3.15 | 51/59 | 1-180 | [»] | |
5F8K | X-ray | 2.80 | 1H/2H | 2-175 | [»] | |
5FDU | X-ray | 2.90 | 1H/2H | 2-175 | [»] | |
5FDV | X-ray | 2.80 | 1H/2H | 2-175 | [»] | |
5HAU | X-ray | 3.00 | 1H/2H | 1-180 | [»] | |
5HCP | X-ray | 2.89 | 1H/2H | 1-180 | [»] | |
5HCQ | X-ray | 2.80 | 1H/2H | 1-180 | [»] | |
5HCR | X-ray | 2.80 | 1H/2H | 1-180 | [»] | |
5HD1 | X-ray | 2.70 | 1H/2H | 1-180 | [»] | |
5IB7 | X-ray | 2.99 | 51/59 | 1-180 | [»] | |
5IB8 | X-ray | 3.13 | 51/59 | 1-180 | [»] | |
5IBB | X-ray | 2.96 | 51/59 | 1-180 | [»] | |
5IMQ | electron microscopy | 3.80 | e | 1-180 | [»] | |
5IMR | electron microscopy | - | e | 1-180 | [»] | |
5J30 | X-ray | 3.20 | RH/YH | 1-180 | [»] | |
5J3C | X-ray | 3.04 | RH/YH | 1-180 | [»] | |
5J4B | X-ray | 2.60 | 1H/2H | 1-180 | [»] | |
5J4C | X-ray | 2.80 | 1H/2H | 1-180 | [»] | |
5J8B | X-ray | 2.60 | H | 1-180 | [»] | |
5NDJ | X-ray | 3.15 | 51/59 | 1-180 | [»] | |
5NDK | X-ray | 2.95 | 51/59 | 1-180 | [»] | |
5OT7 | electron microscopy | 3.80 | k | 1-176 | [»] | |
5UQ7 | electron microscopy | 3.50 | H | 3-175 | [»] | |
5UQ8 | electron microscopy | 3.20 | H | 3-175 | [»] | |
5VP2 | X-ray | 2.80 | 1H/2H | 1-180 | [»] | |
5VPO | X-ray | 3.34 | RH/YH | 1-180 | [»] | |
5VPP | X-ray | 3.90 | RH/YH | 1-180 | [»] | |
5W4K | X-ray | 2.70 | 1H/2H | 1-180 | [»] | |
5WIS | X-ray | 2.70 | 1H/2H | 1-180 | [»] | |
5WIT | X-ray | 2.60 | 1H/2H | 1-180 | [»] | |
5ZLU | electron microscopy | 3.60 | d | 1-180 | [»] | |
6BUW | X-ray | 3.50 | RH/YH | 1-180 | [»] | |
6BZ6 | X-ray | 3.18 | RH/YH | 1-180 | [»] | |
6BZ7 | X-ray | 3.68 | RH/YH | 1-180 | [»] | |
6BZ8 | X-ray | 3.74 | RH/YH | 1-180 | [»] | |
6C5L | X-ray | 3.20 | BH/DH | 1-180 | [»] | |
6CAE | X-ray | 2.60 | 1H/2H | 1-180 | [»] | |
6CFJ | X-ray | 2.80 | 1H/2H | 1-180 | [»] | |
6CFK | X-ray | 2.70 | 1H/2H | 1-180 | [»] | |
6CFL | X-ray | 2.60 | 1H/2H | 1-180 | [»] | |
6CZR | X-ray | 3.14 | 1H/2H | 2-175 | [»] | |
6FKR | X-ray | 3.20 | 1H/2H | 2-175 | [»] | |
6GSJ | X-ray | 2.96 | 51/59 | 1-180 | [»] | |
6GSK | X-ray | 3.36 | 51/59 | 1-180 | [»] | |
6GSL | X-ray | 3.16 | 51/59 | 1-180 | [»] | |
6GZQ | electron microscopy | 3.28 | G1 | 2-171 | [»] | |
6GZX | electron microscopy | 4.57 | G1/G2 | 2-171 | [»] | |
6GZZ | electron microscopy | 4.13 | G1/G2 | 2-171 | [»] | |
6ND5 | X-ray | 2.60 | 1H/2H | 1-180 | [»] | |
6ND6 | X-ray | 2.85 | 1H/2H | 1-180 | [»] | |
6NDK | X-ray | 3.64 | RH/YH | 1-180 | [»] | |
6NSH | X-ray | 3.40 | RH/YH | 1-180 | [»] | |
6NTA | X-ray | 3.10 | RH/YH | 1-180 | [»] | |
6NUO | X-ray | 3.20 | RH/YH | 1-180 | [»] | |
6NWY | X-ray | 3.50 | RH/YH | 1-180 | [»] | |
6O3M | X-ray | 3.97 | RH/YH | 1-180 | [»] | |
6O97 | X-ray | 2.75 | 1H/2H | 1-180 | [»] | |
6OF1 | X-ray | 2.80 | 1H/2H | 1-180 | [»] | |
6OF6 | X-ray | 3.20 | RH/YH | 1-180 | [»] | |
6OJ2 | X-ray | 3.20 | RH/YH | 1-180 | [»] | |
6OPE | X-ray | 3.10 | RH/YH | 1-180 | [»] | |
6ORD | X-ray | 3.10 | RH/YH | 1-180 | [»] | |
6OSI | X-ray | 4.14 | RH/YH | 1-180 | [»] | |
6OTR | X-ray | 3.12 | RH/YH | 1-180 | [»] | |
6OXA | X-ray | 3.25 | RH/YH | 1-180 | [»] | |
6OXI | X-ray | 3.50 | RH/YH | 1-180 | [»] | |
6Q95 | electron microscopy | 3.70 | F | 12-171 | [»] | |
6QNQ | X-ray | 3.50 | 51/59 | 1-180 | [»] | |
6QNR | X-ray | 3.10 | 51/59 | 1-180 | [»] | |
6UCQ | X-ray | 3.50 | 1H/2H | 1-180 | [»] | |
6UO1 | X-ray | 2.95 | 1H/2H | 1-180 | [»] | |
6XHV | X-ray | 2.40 | 1H/2H | 1-180 | [»] | |
6XHW | X-ray | 2.50 | 1H/2H | 1-180 | [»] | |
6XHX | X-ray | 2.55 | 1H/2H | 1-180 | [»] | |
6XHY | X-ray | 2.60 | 1H/2H | 1-180 | [»] | |
6XQD | X-ray | 2.80 | 1H/2H | 1-180 | [»] | |
6XQE | X-ray | 3.00 | 1H/2H | 1-180 | [»] | |
7JQL | X-ray | 3.00 | 1H/2H | 1-180 | [»] | |
7JQM | X-ray | 3.05 | 1H/2H | 1-180 | [»] | |
7LH5 | X-ray | 3.27 | BH/DH | 1-180 | [»] | |
7MD7 | X-ray | 2.80 | 1H/2H | 1-180 | [»] | |
7RQ8 | X-ray | 2.50 | 1H/2H | 1-180 | [»] | |
7RQ9 | X-ray | 2.60 | 1H/2H | 1-180 | [»] | |
7RQA | X-ray | 2.40 | 1H/2H | 1-180 | [»] | |
7RQB | X-ray | 2.45 | 1H/2H | 1-180 | [»] | |
7RQC | X-ray | 2.50 | 1H/2H | 1-180 | [»] | |
7RQD | X-ray | 2.50 | 1H/2H | 1-180 | [»] | |
7RQE | X-ray | 2.40 | 1H/2H | 1-180 | [»] | |
AlphaFoldDBi | P0DOY8 | |||||
SMRi | P0DOY8 | |||||
ModBasei | Search... | |||||
PDBe-KBi | Search... |
Protein-protein interaction databases
IntActi | P0DOY8, 6 interactors |
STRINGi | 300852.55773059 |
Genome annotation databases
EnsemblBacteriai | BAD71500; BAD71500; BAD71500 |
GeneIDi | 3169807 |
KEGGi | ttj:TTHA1677 |
Phylogenomic databases
eggNOGi | COG0097, Bacteria |
HOGENOMi | CLU_065464_1_2_0 |
OMAi | KPDPYKG |
Family and domain databases
Gene3Di | 3.90.930.12, 2 hits |
HAMAPi | MF_01365_B, Ribosomal_L6_B, 1 hit |
InterProi | View protein in InterPro IPR000702, Ribosomal_L6 IPR020040, Ribosomal_L6_a/b-dom IPR036789, Ribosomal_L6_a/b-dom_sf IPR019906, Ribosomal_L6_bac-type |
PANTHERi | PTHR11655, PTHR11655, 1 hit PTHR11655:SF14, PTHR11655:SF14, 1 hit |
Pfami | View protein in Pfam PF00347, Ribosomal_L6, 2 hits |
PIRSFi | PIRSF002162, Ribosomal_L6, 1 hit |
PRINTSi | PR00059, RIBOSOMALL6 |
SUPFAMi | SSF56053, SSF56053, 2 hits |
TIGRFAMsi | TIGR03654, L6_bact, 1 hit |
MobiDBi | Search... |
Entry informationi
Entry namei | RL6_THET8 | |
Accessioni | P0DOY8Primary (citable) accession number: P0DOY8 Secondary accession number(s): Q5SHQ3 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | March 15, 2017 |
Last sequence update: | March 15, 2017 | |
Last modified: | May 25, 2022 | |
This is version 37 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Prokaryotic Protein Annotation Program |
Miscellaneousi
Keywords - Technical termi
3D-structure, Direct protein sequencing, Reference proteomeDocuments
- Ribosomal proteins
Ribosomal proteins families and list of entries - PDB cross-references
Index of Protein Data Bank (PDB) cross-references - SIMILARITY comments
Index of protein domains and families