SEQ2FUN

BioLiP
Download all results in tab-seperated text for 942758 receptor-ligand interactions, whose format is explained at readme.txt.
  • Hover over PDB to view the title of the structure. Click PDB to view the structure at the RCSB PDB database. Resolution -1.00 means the resolution is unavailable, e.g., for NMR structures.
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  • Hover over Ligand to view the full ligand name. Click Ligand to view the 2D diagram and other detail information of the ligand.
  • Hover over EC number to view the full name of enzymatic activity.
  • Hover over GO terms to view all GO terms.
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    # PDB
    (Resolution Å)
    Site # Ligand EC number GO terms UniProt PubMed Binding
    affinity
    478601 6hu0:A (1.746) BS02 T86 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=122nM
    BindingDB: IC50=120nM
    478602 6hu0:B (1.746) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478603 6hu0:B (1.746) BS02 T86 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=122nM
    BindingDB: IC50=120nM
    478604 6hu0:C (1.746) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478605 6hu0:C (1.746) BS02 T86 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=122nM
    BindingDB: IC50=120nM
    478606 6hu0:D (1.746) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478607 6hu0:D (1.746) BS02 T86 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=122nM
    BindingDB: IC50=120nM
    478608 6hu1:A (1.996) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478609 6hu1:A (1.996) BS02 GT2 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=191nM
    BindingDB: IC50=191nM
    478610 6hu1:B (1.996) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478611 6hu1:B (1.996) BS02 GT2 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=191nM
    BindingDB: IC50=191nM
    478612 6hu1:C (1.996) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478613 6hu1:C (1.996) BS02 GT2 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=191nM
    BindingDB: IC50=191nM
    478614 6hu1:D (1.996) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478615 6hu1:D (1.996) BS02 GT2 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=191nM
    BindingDB: IC50=191nM
    478616 6hu2:A (1.986) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478617 6hu2:A (1.986) BS02 T34 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=1260nM
    478618 6hu2:B (1.986) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478619 6hu2:B (1.986) BS02 T34 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=1260nM
    478620 6hu2:C (1.986) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478621 6hu2:C (1.986) BS02 T34 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=1260nM
    478622 6hu2:D (1.986) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478623 6hu2:D (1.986) BS02 T34 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=1260nM
    478624 6hu3:A (1.655) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478625 6hu3:A (1.655) BS02 GRZ 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=504nM
    BindingDB: IC50=504nM
    478626 6hu3:A (1.655) BS03 GRZ 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=504nM
    BindingDB: IC50=504nM
    478627 6hu3:B (1.655) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478628 6hu3:B (1.655) BS02 GRZ 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=504nM
    BindingDB: IC50=504nM
    478629 6hu3:C (1.655) BS01 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478630 6hu3:C (1.655) BS02 GRZ 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=504nM
    BindingDB: IC50=504nM
    478631 6hu3:D (1.655) BS01 GRZ 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=504nM
    BindingDB: IC50=504nM
    478632 6hu3:D (1.655) BS02 ZN 3.5.1.98 GO:0004407 ... A5H660 30347148
    478633 6hu3:D (1.655) BS03 GRZ 3.5.1.98 GO:0004407 ... A5H660 30347148 MOAD: ic50=504nM
    BindingDB: IC50=504nM
    478634 6hu4:A (2.64) BS01 peptide ? GO:0003677 ... P03146 30539760
    478635 6hu4:B (2.64) BS01 peptide ? GO:0003677 ... P03146 30539760
    478636 6hu4:C (2.64) BS01 peptide ? GO:0003677 ... P03146 30539760
    478637 6hu4:D (2.64) BS01 peptide ? GO:0003677 ... P03146 30539760
    478638 6hu7:A (2.8) BS01 peptide ? GO:0003677 ... P03146 30539760
    478639 6hu7:C (2.8) BS01 peptide ? GO:0003677 ... P03146 30539760
    478640 6hu7:D (2.8) BS01 peptide ? GO:0003677 ... P03146 30539760
    478641 6hu9:C (3.35) BS01 HEM 7.1.1.8 GO:0005739 ... P00163 30598554
    478642 6hu9:C (3.35) BS02 HEM 7.1.1.8 GO:0005739 ... P00163 30598554
    478643 6hu9:C (3.35) BS03 UQ6 7.1.1.8 GO:0005739 ... P00163 30598554
    478644 6hu9:D (3.35) BS01 HEC 7.1.1.8 GO:0009055 ... P07143 30598554
    478645 6hu9:E (3.35) BS01 FES 7.1.1.8 GO:0008121 ... P08067 30598554
    478646 6hu9:N (3.35) BS01 HEM 7.1.1.8 GO:0005739 ... P00163 30598554
    478647 6hu9:N (3.35) BS02 HEM 7.1.1.8 GO:0005739 ... P00163 30598554
    478648 6hu9:O (3.35) BS01 HEC 7.1.1.8 GO:0009055 ... P07143 30598554
    478649 6hu9:P (3.35) BS01 FES 7.1.1.8 GO:0008121 ... P08067 30598554
    478650 6hu9:a (3.35) BS01 CU 7.1.1.9 GO:0004129 ... P00401 30598554
    478651 6hu9:a (3.35) BS02 HEA 7.1.1.9 GO:0004129 ... P00401 30598554
    478652 6hu9:a (3.35) BS03 HEA 7.1.1.9 GO:0004129 ... P00401 30598554
    478653 6hu9:a (3.35) BS04 CA 7.1.1.9 GO:0004129 ... P00401 30598554
    478654 6hu9:a (3.35) BS05 MG 7.1.1.9 GO:0004129 ... P00401 30598554
    478655 6hu9:b (3.35) BS01 HEA 7.1.1.9 GO:0004129 ... P00410 30598554
    478656 6hu9:b (3.35) BS02 CUA 7.1.1.9 GO:0004129 ... P00410 30598554
    478657 6hu9:b (3.35) BS03 CUA 7.1.1.9 GO:0004129 ... P00410 30598554
    478658 6hu9:d (3.35) BS01 ZN 1.9.3.1 GO:0005740 ... P04037 30598554
    478659 6hu9:m (3.35) BS01 CU 7.1.1.9 GO:0004129 ... P00401 30598554
    478660 6hu9:m (3.35) BS02 HEA 7.1.1.9 GO:0004129 ... P00401 30598554
    478661 6hu9:m (3.35) BS03 HEA 7.1.1.9 GO:0004129 ... P00401 30598554
    478662 6hu9:m (3.35) BS04 CA 7.1.1.9 GO:0004129 ... P00401 30598554
    478663 6hu9:m (3.35) BS05 MG 7.1.1.9 GO:0004129 ... P00401 30598554
    478664 6hu9:n (3.35) BS01 HEA 7.1.1.9 GO:0004129 ... P00410 30598554
    478665 6hu9:n (3.35) BS02 CUA 7.1.1.9 GO:0004129 ... P00410 30598554
    478666 6hu9:n (3.35) BS03 CUA 7.1.1.9 GO:0004129 ... P00410 30598554
    478667 6hu9:p (3.35) BS01 ZN 1.9.3.1 GO:0005740 ... P04037 30598554
    478668 6hua:A (3.389) BS01 peptide ? GO:0003677 ... E3CNF6 32198205
    478669 6hua:B (3.389) BS01 peptide ? GO:0003677 ... E3CNF6 32198205
    478670 6hub:G (2.9) BS01 MG 3.4.25.1 GO:0000502 ... P21243 30657666
    478671 6hub:H (2.9) BS01 GRW 3.4.25.1 GO:0004298 ... Q99436 30657666
    478672 6hub:I (2.9) BS01 MG 3.4.25.1 GO:0000502 ... P25451 30657666
    478673 6hub:K (2.9) BS01 GRW 3.4.25.1 GO:0004298 ... P30656 30657666
    478674 6hub:K (2.9) BS02 MG 3.4.25.1 GO:0004298 ... P30656 30657666
    478675 6hub:N (2.9) BS01 MG 3.4.25.1 GO:0000502 ... P38624 30657666
    478676 6hub:V (2.9) BS01 MG 3.4.25.1 GO:0004298 ... Q99436 30657666
    478677 6hub:V (2.9) BS02 GRW 3.4.25.1 GO:0004298 ... Q99436 30657666
    478678 6hub:Y (2.9) BS01 MG 3.4.25.1 GO:0004298 ... P30656 30657666
    478679 6hub:Y (2.9) BS02 GRW 3.4.25.1 GO:0004298 ... P30656 30657666
    478680 6hub:Z (2.9) BS01 MG 3.4.25.1 GO:0000502 ... P23724 30657666
    478681 6huc:G (3.0) BS01 MG 3.4.25.1 GO:0000502 ... P21243 30657666
    478682 6huc:H (3.0) BS01 GRT 3.4.25.1 GO:0004298 ... Q99436 30657666
    478683 6huc:I (3.0) BS01 GRT 3.4.25.1 GO:0000502 ... P25451 30657666
    478684 6huc:K (3.0) BS01 GRT 3.4.25.1 GO:0004298 ... P30656 30657666
    478685 6huc:K (3.0) BS02 MG 3.4.25.1 GO:0004298 ... P30656 30657666
    478686 6huc:N (3.0) BS01 MG 3.4.25.1 GO:0000502 ... P38624 30657666
    478687 6huc:V (3.0) BS01 GRT 3.4.25.1 GO:0004298 ... Q99436 30657666
    478688 6huc:V (3.0) BS02 MG 3.4.25.1 GO:0004298 ... Q99436 30657666
    478689 6huc:W (3.0) BS01 GRT 3.4.25.1 GO:0000502 ... P25451 30657666
    478690 6huc:Y (3.0) BS01 GRT 3.4.25.1 GO:0004298 ... P30656 30657666
    478691 6huc:Y (3.0) BS02 MG 3.4.25.1 GO:0004298 ... P30656 30657666
    478692 6hue:A (2.85) BS01 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478693 6hue:A (2.85) BS02 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478694 6hue:A (2.85) BS03 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478695 6hue:A (2.85) BS04 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478696 6hue:A (2.85) BS05 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478697 6hue:A (2.85) BS06 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478698 6hue:A (2.85) BS07 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478699 6hue:A (2.85) BS08 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478700 6hue:B (2.85) BS01 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478701 6hue:B (2.85) BS02 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478702 6hue:B (2.85) BS03 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478703 6hue:B (2.85) BS04 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478704 6hue:B (2.85) BS05 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478705 6hue:B (2.85) BS06 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478706 6hue:B (2.85) BS07 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478707 6hue:B (2.85) BS08 ZN 2.3.2.31 GO:0004842 ... O60260 30404819
    478708 6huf:A (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478709 6huf:A (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478710 6huf:B (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478711 6huf:B (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478712 6huf:C (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478713 6huf:C (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478714 6huf:D (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478715 6huf:D (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478716 6huf:E (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478717 6huf:E (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478718 6huf:F (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478719 6huf:F (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478720 6huf:G (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478721 6huf:G (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478722 6huf:H (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478723 6huf:H (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478724 6huf:I (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478725 6huf:I (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478726 6huf:J (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478727 6huf:J (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478728 6huf:K (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478729 6huf:K (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478730 6huf:L (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478731 6huf:L (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478732 6huf:M (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478733 6huf:M (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478734 6huf:N (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478735 6huf:N (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478736 6huf:O (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478737 6huf:O (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478738 6huf:P (2.82) BS01 MG 3.6.5.2 GO:0003924 ... P51159 30950405
    478739 6huf:P (2.82) BS02 GNP 3.6.5.2 GO:0003924 ... P51159 30950405
    478740 6hug:A (3.1) BS01 PIO ? GO:0004888 ... P08219 30602790
    478741 6hug:A (3.1) BS02 RI5 ? GO:0004888 ... P08219 30602790
    478742 6hug:C (3.1) BS01 MAN ? GO:0004888 ... P18507 30602790
    478743 6hug:C (3.1) BS02 MAN ? GO:0004888 ... P18507 30602790
    478744 6hug:C (3.1) BS03 RI5 ? GO:0004888 ... P18507 30602790
    478745 6hug:D (3.1) BS01 RI5 ? GO:0004888 ... P08219 30602790
    478746 6hug:D (3.1) BS02 PIO ? GO:0004888 ... P08219 30602790
    478747 6hug:E (3.1) BS01 RI5 ? GO:0004888 ... P28472 30602790
    478748 6hui:A (2.995) BS01 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478749 6hui:A (2.995) BS02 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478750 6hui:B (2.995) BS01 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478751 6hui:B (2.995) BS02 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478752 6hui:C (2.995) BS01 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478753 6hui:C (2.995) BS02 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478754 6hui:D (2.995) BS01 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478755 6hui:D (2.995) BS02 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478756 6hui:D (2.995) BS03 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478757 6hui:D (2.995) BS04 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478758 6hui:D (2.995) BS05 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478759 6hui:E (2.995) BS01 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478760 6hui:E (2.995) BS02 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478761 6hui:F (2.995) BS01 ZN 1.16.-.- GO:0005737 ... P80725 31433627
    478762 6huj:A (3.04) BS01 PIO ? GO:0004888 ... P08219
    P14867
    30602790
    478763 6huj:A (3.04) BS02 RI5 ? GO:0004888 ... P08219
    P14867
    30602790
    478764 6huj:A (3.04) BS03 ABU ? GO:0004888 ... P08219
    P14867
    30602790
    478765 6huj:B (3.04) BS01 ABU ? GO:0004888 ... P28472 30602790
    478766 6huj:C (3.04) BS01 RI5 ? GO:0004888 ... P18507 30602790
    478767 6huj:D (3.04) BS01 RI5 ? GO:0004888 ... P08219
    P14867
    30602790
    478768 6huj:D (3.04) BS02 PIO ? GO:0004888 ... P08219
    P14867
    30602790
    478769 6huj:D (3.04) BS03 ABU ? GO:0004888 ... P08219
    P14867
    30602790
    478770 6huj:E (3.04) BS01 RI5 ? GO:0004888 ... P28472 30602790
    478771 6huj:E (3.04) BS02 ABU ? GO:0004888 ... P28472 30602790
    478772 6huk:A (3.69) BS01 H0Z ? GO:0004888 ... P08219 30602790
    478773 6huk:A (3.69) BS02 PIO ? GO:0004888 ... P08219 30602790
    478774 6huk:B (3.69) BS01 H0Z ? GO:0004888 ... P28472 30602790
    478775 6huk:D (3.69) BS01 PIO ? GO:0004888 ... P08219 30602790
    478776 6huk:D (3.69) BS02 H0Z ? GO:0004888 ... P08219 30602790
    478777 6huk:E (3.69) BS01 H0Z ? GO:0004888 ... P28472 30602790
    478778 6hul:A (2.55) BS01 G3P 4.2.1.20 GO:0000162 ... P50382 30367843
    478779 6hul:B (2.55) BS01 SER 4.2.1.20 GO:0000162 ... P50383 30367843
    478780 6hul:B (2.55) BS02 PLP 4.2.1.20 GO:0000162 ... P50383 30367843
    478781 6hum:I (3.34) BS01 SF4 7.1.1.- GO:0005506 ... Q8DL31 30573545
    478782 6hum:I (3.34) BS02 SF4 7.1.1.- GO:0005506 ... Q8DL31 30573545
    478783 6hum:K (3.34) BS01 SF4 7.1.1.- GO:0005506 ... Q8DKZ4 30573545
    478784 6hun:A (1.802) BS01 CA 4.1.1.39 GO:0000287 ... A2BK54 31205016
    478785 6huo:A (3.26) BS01 ABU ? GO:0004888 ... P08219
    P14867
    30602790
    478786 6huo:A (3.26) BS02 PIO ? GO:0004888 ... P08219
    P14867
    30602790
    478787 6huo:B (3.26) BS01 ABU ? GO:0004888 ... P28472 30602790
    478788 6huo:C (3.26) BS01 08H ? GO:0004888 ... P18507 30602790
    478789 6huo:D (3.26) BS01 08H ? GO:0004888 ... P08219
    P14867
    30602790
    478790 6huo:D (3.26) BS02 PIO ? GO:0004888 ... P08219
    P14867
    30602790
    478791 6huo:D (3.26) BS03 ABU ? GO:0004888 ... P08219
    P14867
    30602790
    478792 6huo:E (3.26) BS01 ABU ? GO:0004888 ... P28472 30602790
    478793 6hup:A (3.58) BS01 PIO ? GO:0004888 ... P08219
    P14867
    30602790
    478794 6hup:A (3.58) BS02 ABU ? GO:0004888 ... P08219
    P14867
    30602790
    478795 6hup:A (3.58) BS03 DZP ? GO:0004888 ... P08219
    P14867
    30602790
    478796 6hup:B (3.58) BS01 ABU ? GO:0004888 ... P28472 30602790
    478797 6hup:B (3.58) BS02 DZP ? GO:0004888 ... P28472 30602790
    478798 6hup:C (3.58) BS01 DZP ? GO:0004888 ... P18507 30602790
    478799 6hup:D (3.58) BS01 DZP ? GO:0004888 ... P08219
    P14867
    30602790
    478800 6hup:D (3.58) BS02 PIO ? GO:0004888 ... P08219
    P14867
    30602790

    Reference:
  • Chengxin Zhang, Xi Zhang, Lydia Freddolino, and Yang Zhang. BioLiP2: an updated structure database for biologically relevent ligand-protein interactions, Nucleic Acids Research, gkad630 (2023).
  • Jianyi Yang, Ambrish Roy, and Yang Zhang. BioLiP: a semi-manually curated database for biologically relevant ligand-protein interactions, Nucleic Acids Research, 41: D1096-D1103 (2013) (download the PDF file).