Protein: CTSR1
Cation channel sperm-associated protein 1 (CatSper1) (hCatSper)

Gene: CTSR1, CATSPER1
Organism: Homo sapiens
Interactions: 124
UniProt ID: Q8NEC5

Gene Ontology (top 5):
GO:0005227 - calcium-activated cation channel activity
GO:0005245 - voltage-gated calcium channel activity
GO:0005886 - plasma membrane
GO:0006816 - calcium ion transport
GO:0007283 - spermatogenesis

Download interactions: TXT   MITAB-2.5

Interaction Interactor Experiments Homologs Category Interaction
Score
Confidence

1151589

TRIP6
Thyroid receptor-interacting protein 6

4

5

High-throughput

0.705

High

303166

RGS20
Regulator of G-protein signaling 20

4

2

High-throughput

0.703

High

1337329

CTSR1
Cation channel sperm-associated protein 1

1

15

High-throughput

0.698

High

1337359

CAC1I
Voltage-dependent T-type calcium channel subunit alpha-1I

1

9

Small-scale

0.690

High

1337357

PLS3
Phospholipid scramblase 3

3

1

High-throughput

0.675

High

1277321

NT2NA
Notch homolog 2 N-terminal-like protein A

3

8

High-throughput

0.667

High

894911

EMD
Emerin

4

3

High-throughput

0.647

High

1337335

KR412
Keratin-associated protein 4-12

4

20

High-throughput

0.644

High

1337362

CHIC2
Cysteine-rich hydrophobic domain-containing protein 2

3

0

High-throughput

0.639

High

221158

SPY2
Protein sprouty homolog 2

2

4

High-throughput

0.633

High

353455

AGR2
Anterior gradient protein 2 homolog

3

3

High-throughput

0.616

High

685910

KRA59
Keratin-associated protein 5-9

3

20

High-throughput

0.616

High

950586

KR108
Keratin-associated protein 10-8

3

20

High-throughput

0.616

High

950837

KR109
Keratin-associated protein 10-9

3

20

High-throughput

0.616

High

1219119

KHDR2
KH domain-containing, RNA-binding, signal transduction-associated protein 2

3

4

High-throughput

0.616

High

1337343

KRA92
Keratin-associated protein 9-2

3

20

High-throughput

0.616

High

1337344

KR411
Keratin-associated protein 4-11

3

20

High-throughput

0.616

High

124623

EYA2
Protein phosphatase EYA2

2

2

High-throughput

0.606

High

165184

TSN4
Tetraspanin-4

2

4

High-throughput

0.606

High

220276

FRS3
Fibroblast growth factor receptor substrate 3

2

1

High-throughput

0.606

High

572081

TRI27
Zinc finger protein RFP

2

6

High-throughput

0.606

High

626967

FST
Follistatin

2

5

High-throughput

0.606

High

870145

LIMS1
LIM and senescent cell antigen-like-containing domain protein 1

2

7

High-throughput

0.606

High

890637

RGS19
Regulator of G-protein signaling 19

2

2

High-throughput

0.606

High

1224866

TENS2
Tensin-2

2

1

High-throughput

0.606

High

1337333

AJUBA
LIM domain-containing protein ajuba

2

7

High-throughput

0.606

High

1337336

LZTS2
Leucine zipper putative tumor suppressor 2

2

19

High-throughput

0.606

High

1337356

PDLI7
PDZ and LIM domain protein 7

2

7

High-throughput

0.606

High

1337360

PAK5
Serine/threonine-protein kinase PAK 5

2

2

High-throughput

0.606

High

74355

ZBT42
Zinc finger and BTB domain-containing protein 42

2

0

High-throughput

0.580

High

376875

TGFB1
Transforming growth factor beta-1 proprotein [Cleaved into: Latency-associated peptide

2

0

High-throughput

0.580

High

466685

GLI1
Zinc finger protein GLI1

2

0

High-throughput

0.580

High

1279453

SAXO4
Stabilizer of axonemal microtubules 4

2

0

High-throughput

0.580

High

1335992

SMIP6
Sperm microtubule inner protein 6

2

0

High-throughput

0.580

High

1337354

CFA68
Cilia- and flagella-associated protein 68

2

0

High-throughput

0.580

High

1205887

MTUS2
Microtubule-associated tumor suppressor candidate 2

2

17

High-throughput

0.573

High

180556

PLS1
Phospholipid scramblase 1

1

1

High-throughput

0.573

High

950943

KR10B
Keratin-associated protein 10-11

2

20

High-throughput

0.558

High

70367

CRTP1
Cysteine-rich tail protein 1

2

2

High-throughput

0.553

High

221426

SPY3
Protein sprouty homolog 3

2

4

High-throughput

0.553

High

250293

VINEX
Vinexin

2

8

High-throughput

0.553

High

322510

ABLM3
Actin-binding LIM protein 3

2

7

High-throughput

0.553

High

505744

ZN688
Zinc finger protein 688

2

1

High-throughput

0.553

High

553756

MYCL
Protein L-Myc

2

1

High-throughput

0.553

High

729356

HNRH1
Heterogeneous nuclear ribonucleoprotein H

2

19

High-throughput

0.553

High

885339

HXA1
Homeobox protein Hox-A1

2

2

High-throughput

0.553

High

941499

CTBP2
C-terminal-binding protein 2

2

2

High-throughput

0.553

High

948291

KR121
Keratin-associated protein 12-1

2

2

High-throughput

0.553

High

948361

KR122
Keratin-associated protein 12-2

2

20

High-throughput

0.553

High

948721

KR10A
Keratin-associated protein 10-10

2

20

High-throughput

0.553

High

949597

KR123
Keratin-associated protein 12-3

2

2

High-throughput

0.553

High

1044681

ARI5A
AT-rich interactive domain-containing protein 5A

2

2

High-throughput

0.553

High

1059696

KRA11
Keratin-associated protein 1-1

2

20

High-throughput

0.553

High

1133123

LASP1
LIM and SH3 domain protein 1

2

7

High-throughput

0.553

High

1146054

K1H1
Keratin, type I cuticular Ha1

2

9

High-throughput

0.553

High

1163739

PTN21
Tyrosine-protein phosphatase non-receptor type 21

2

20

High-throughput

0.553

High

1180113

VWC2
Brorin

2

11

High-throughput

0.553

High

1216137

FHL5
Four and a half LIM domains protein 5

2

8

High-throughput

0.553

High

1235770

KR511
Keratin-associated protein 5-11

2

20

High-throughput

0.553

High

1235868

KRA54
Keratin-associated protein 5-4

2

20

High-throughput

0.553

High

1235891

KRA53
Keratin-associated protein 5-3

2

20

High-throughput

0.553

High

1250140

RSPO2
R-spondin-2

2

2

High-throughput

0.553

High

1307418

KRA13
Keratin-associated protein 1-3

2

20

High-throughput

0.553

High

1311443

TRI42
Tripartite motif-containing protein 42

2

9

High-throughput

0.553

High

1329051

CPSF7
Cleavage and polyadenylation specificity factor subunit 7

2

7

High-throughput

0.553

High

1337330

AGR3
Anterior gradient protein 3

2

3

High-throughput

0.553

High

1337338

CAR10
Caspase recruitment domain-containing protein 10

2

20

High-throughput

0.553

High

1337340

KRA98
Keratin-associated protein 9-8

2

20

High-throughput

0.553

High

1337342

KRA93
Keratin-associated protein 9-3

2

20

High-throughput

0.553

High

1337345

KRA41
Keratin-associated protein 4-1

2

20

High-throughput

0.553

High

1337347

KRA44
Keratin-associated protein 4-4

2

20

High-throughput

0.553

High

1337348

KRA42
Keratin-associated protein 4-2

2

20

High-throughput

0.553

High

1337351

KRA15
Keratin-associated protein 1-5

2

20

High-throughput

0.553

High

1337352

TRIM8
E3 ubiquitin-protein ligase TRIM8

2

10

High-throughput

0.553

High

1337363

IKZF3
Zinc finger protein Aiolos

2

2

High-throughput

0.553

High

1337364

AKP8L
A-kinase anchor protein 8-like

2

1

High-throughput

0.553

High

949748

KR101
Keratin-associated protein 10-1

2

20

High-throughput

0.533

High

1090802

TRAF2
TNF receptor-associated factor 2

1

5

High-throughput

0.523

High

1337341

KRA94
Keratin-associated protein 9-4

1

20

High-throughput

0.523

High

1337353

CHRD
Chordin

1

16

High-throughput

0.523

High

1337361

RIM3A
RIMS-binding protein 3A

1

9

High-throughput

0.523

High

351570

FBLN4
EGF-containing fibulin-like extracellular matrix protein 2

1

14

High-throughput

0.494

High

517065

NT2NC
Notch homolog 2 N-terminal-like protein C

1

8

High-throughput

0.470

High

950101

KR105
Keratin-associated protein 10-5

1

20

High-throughput

0.470

High

950220

KR104
Keratin-associated protein 10-4

1

20

High-throughput

0.470

High

1280837

Q7Z783
Protein sprouty homolog 2

1

4

High-throughput

0.470

High

1337346

KRA47
Keratin-associated protein 4-7

1

20

High-throughput

0.470

High

1337350

KRA24
Keratin-associated protein 2-4

1

20

High-throughput

0.470

High

580

NBPFJ
NBPF family member NBPF19

1

10

High-throughput

0.439

High

505357

KRA23
Keratin-associated protein 2-3

1

20

High-throughput

0.439

High

949941

KR103
Keratin-associated protein 10-3

1

20

High-throughput

0.439

High

950340

KR107
Keratin-associated protein 10-7

1

20

High-throughput

0.439

High

387542

APOA2
Apolipoprotein A-II

4

0

High-throughput

0.368

High

1235836

KRA56
Keratin-associated protein 5-6

3

0

High-throughput

0.352

High

1301002

RFX6
DNA-binding protein RFX6

3

0

High-throughput

0.352

High

1250261

ATL4
ADAMTS-like protein 4

3

0

High-throughput

0.348

High

1337334

MDFI
MyoD family inhibitor

3

0

High-throughput

0.348

High

186264

SIVA
Apoptosis regulatory protein Siva

2

0

High-throughput

0.316

High

192114

PA2GX
Group 10 secretory phospholipase A2

2

0

High-throughput

0.316

High

1186581

KRA61
Keratin-associated protein 6-1

2

0

High-throughput

0.316

High

1186666

KRA62
Keratin-associated protein 6-2

2

0

High-throughput

0.316

High

1186839

KR196
Keratin-associated protein 19-6

2

0

High-throughput

0.316

High

1186893

KR195
Keratin-associated protein 19-5

2

0

High-throughput

0.316

High

1187891

KR197
Keratin-associated protein 19-7

2

0

High-throughput

0.316

High

1213782

KPRP
Keratinocyte proline-rich protein

2

0

High-throughput

0.316

High

1213956

LCE1D
Late cornified envelope protein 1D

2

0

High-throughput

0.316

High

1213997

LCE1E
Late cornified envelope protein 1E

2

0

High-throughput

0.316

High

1214040

LCE1F
Late cornified envelope protein 1F

2

0

High-throughput

0.316

High

1215184

LCE2C
Late cornified envelope protein 2C

2

0

High-throughput

0.316

High

1239082

CDPF1
Cysteine-rich DPF motif domain-containing protein 1

2

0

High-throughput

0.316

High

1239183

ZN774
Zinc finger protein 774

2

0

High-throughput

0.316

High

1240752

PMF1
Polyamine-modulated factor 1

2

0

High-throughput

0.316

High

1337332

ZN837
Zinc finger protein 837

2

0

High-throughput

0.316

High

1337339

KR171
Keratin-associated protein 17-1

2

0

High-throughput

0.316

High

1337349

KRA32
Keratin-associated protein 3-2

2

0

High-throughput

0.316

High

1337358

ZIM2
Zinc finger imprinted 2

2

0

High-throughput

0.316

High

1337365

PLAL2
Zinc finger protein PLAGL2

2

0

High-throughput

0.316

High

291719

SCRG1
Scrapie-responsive protein 1

1

0

High-throughput

0.299

High

1337337

BEGIN
Brain-enriched guanylate kinase-associated protein

1

0

High-throughput

0.282

High

1214316

LCE1B
Late cornified envelope protein 1B

1

0

High-throughput

0.251

Low

1215944

LCE5A
Late cornified envelope protein 5A

1

0

High-throughput

0.251

Low

1337331

SRB4D
Scavenger receptor cysteine-rich domain-containing group B protein

1

0

High-throughput

0.251

Low

1337355

CK016
Uncharacterized protein C11orf16

1

0

High-throughput

0.251

Low


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Last updated: 11Aug2025