Protein: RS21
Small ribosomal subunit protein bS21 (30S ribosomal protein S21)

Gene: RS21, rpsU
Organism: Escherichia coli K-12
Interactions: 27
UniProt ID: P68679

Gene Ontology (top 5):
GO:0000028 - ribosomal small subunit assembly
GO:0002181 - cytoplasmic translation
GO:0003735 - structural constituent of ribosome
GO:0005737 - cytoplasm
GO:0005829 - cytosol

Download interactions: TXT   MITAB-2.5

Interaction Interactor Experiments Homologs Category Interaction
Score
Confidence

501620

YFIF
Uncharacterized tRNA/rRNA methyltransferase YfiF

2

1

High-throughput

0.588

High

992125

RLMB
23S rRNA

2

1

High-throughput

0.588

High

494650

RPOA
DNA-directed RNA polymerase subunit alpha

2

0

High-throughput

0.576

High

494996

TIG
Trigger factor

2

0

Small-scale

0.576

High

496270

CSPD
Cold shock-like protein CspD

2

0

High-throughput

0.576

High

491516

IF3
Translation initiation factor IF-3 [Cleaved into: Translation initiation factor IF-3, N-terminally processed; Translation initiation factor IF-3S]

2

0

High-throughput

0.563

High

495940

RPOB
DNA-directed RNA polymerase subunit beta

2

0

High-throughput

0.563

High

497121

DEAD
ATP-dependent RNA helicase DeaD

2

0

High-throughput

0.563

High

498405

CLPA
ATP-dependent Clp protease ATP-binding subunit ClpA

2

0

High-throughput

0.563

High

638587

RNR
Ribonuclease R

2

0

High-throughput

0.563

High

663210

PSS
CDP-diacylglycerol--serine O-phosphatidyltransferase PssA

2

0

High-throughput

0.563

High

790852

RLUB
Ribosomal large subunit pseudouridine synthase B

2

0

High-throughput

0.563

High

494391

RS8
Small ribosomal subunit protein uS8

1

0

High-throughput

0.518

High

384060

RL15
Large ribosomal subunit protein uL15

1

0

High-throughput

0.513

High

494343

RS5
Small ribosomal subunit protein uS5

1

0

High-throughput

0.513

High

496695

RNG
Ribonuclease G

1

1

High-throughput

0.484

High

638635

RNE
Ribonuclease E

1

1

High-throughput

0.484

High

500739

NUSG
Transcription termination/antitermination protein NusG

1

0

High-throughput

0.479

High

999333

DCYD
D-cysteine desulfhydrase

1

0

High-throughput

0.479

High

515985

RCSB
Transcriptional regulatory protein RcsB

1

0

High-throughput

0.464

High

495593

TMAR
Pole-localizer protein TmaR

1

0

High-throughput

0.458

High

501544

SSB
Single-stranded DNA-binding protein

1

0

High-throughput

0.426

High

494583

RNPA
Ribonuclease P protein component

2

0

High-throughput

0.307

High

495292

YACL
UPF0231 protein YacL

2

0

High-throughput

0.307

High

499536

YECA
Uncharacterized protein YecA

1

0

High-throughput

0.279

Low

786975

YADG
Uncharacterized ABC transporter ATP-binding protein YadG

1

0

High-throughput

0.261

Low

495453

TRMB
tRNA

1

0

High-throughput

0.253

Low


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Last updated: 11Aug2025