Interleukin-6 receptor subunit beta

UniProt data

UniProt name: IL6RB_HUMAN (P40189)

Gene name: IL6ST

Organism: Homo sapiens (Human).

Function: Signal-transducing molecule. The receptor systems for IL6, LIF, OSM, CNTF, IL11, CTF1 and BSF3 can utilize IL6ST for initiating signal transmission. Binding of IL6 to IL6R induces IL6ST homodimerization and formation of a high-affinity receptor complex, which activates Janus kinases (PubMed:2261637). That causes phosphorylation of IL6ST tyrosine residues which in turn activates STAT3 (PubMed:19915009, PubMed:23294003). Mediates signals which regulate immune response, hematopoiesis, pain control and bone metabolism (By similarity). Has a role in embryonic development (By similarity). Does not bind IL6 (PubMed:2261637). Essential for survival of motor and sensory neurons and for differentiation of astrocytes (By similarity). Required for expression of TRPA1 in nociceptive neurons (By similarity). Required for the maintenance of PTH1R expression in the osteoblast lineage and for the stimulation of PTH-induced osteoblast differentiation (By similarity). Required for normal trabecular bone mass and cortical bone composition (By similarity). {ECO:0000250|UniProtKB:Q00560, ECO:0000269|PubMed:19915009, ECO:0000269|PubMed:2261637, ECO:0000269|PubMed:23294003}.

Subcellular location: Isoform 2: Secreted {ECO:0000269|PubMed:24629561}.

Transmembrane domains:

  1. 620-641, 22 AA, Helical. {ECO:0000255}.

Sequence: 918 AA

10 20 30 40 50 60 MLTLQTWLVQ ALFIFLTTES TGELLDPCGY ISPESPVVQL HSNFTAVCVL KEKCMDYFHV 70 80 90 100 110 120 NANYIVWKTN HFTIPKEQYT IINRTASSVT FTDIASLNIQ LTCNILTFGQ LEQNVYGITI 130 140 150 160 170 180 ISGLPPEKPK NLSCIVNEGK KMRCEWDGGR ETHLETNFTL KSEWATHKFA DCKAKRDTPT 190 200 210 220 230 240 SCTVDYSTVY FVNIEVWVEA ENALGKVTSD HINFDPVYKV KPNPPHNLSV INSEELSSIL 250 260 270 280 290 300 KLTWTNPSIK SVIILKYNIQ YRTKDASTWS QIPPEDTAST RSSFTVQDLK PFTEYVFRIR 310 320 330 340 350 360 CMKEDGKGYW SDWSEEASGI TYEDRPSKAP SFWYKIDPSH TQGYRTVQLV WKTLPPFEAN 370 380 390 400 410 420 GKILDYEVTL TRWKSHLQNY TVNATKLTVN LTNDRYLATL TVRNLVGKSD AAVLTIPACD 430 440 450 460 470 480 FQATHPVMDL KAFPKDNMLW VEWTTPRESV KKYILEWCVL SDKAPCITDW QQEDGTVHRT 490 500 510 520 530 540 YLRGNLAESK CYLITVTPVY ADGPGSPESI KAYLKQAPPS KGPTVRTKKV GKNEAVLEWD 550 560 570 580 590 600 QLPVDVQNGF IRNYTIFYRT IIGNETAVNV DSSHTEYTLS SLTSDTLYMV RMAAYTDEGG 610 620 630 640 650 660 KDGPEFTFTT PKFAQGEIEA IVVPVCLAFL LTTLLGVLFC FNKRDLIKKH IWPNVPDPSK 670 680 690 700 710 720 SHIAQWSPHT PPRHNFNSKD QMYSDGNFTD VSVVEIEAND KKPFPEDLKS LDLFKKEKIN 730 740 750 760 770 780 TEGHSSGIGG SSCMSSSRPS ISSSDENESS QNTSSTVQYS TVVHSGYRHQ VPSVQVFSRS 790 800 810 820 830 840 ESTQPLLDSE ERPEDLQLVD HVDGGDGILP RQQYFKQNCS QHESSPDISH FERSKQVSSV 850 860 870 880 890 900 NEEDFVRLKQ QISDHISQSC GSGQMKMFQE VSAADAFGPG TEGQVERFET VGMEAATDEG 910 MPKSYLPQTV RQGGYMPQ

CATM prediction

The sequence of IL6RB_HUMAN returned 1 potential models

The positions at the dimer's interface are highlighted in yellow. The position at the crossing point is highlighted in orange.

# Sequence and interface d θ Z' ω' Score
     620       630       640  
   |    +    |    +    |    		 (Å) (°) (Å) (°)  
Model 1 EIEAIVVAVCLAFLLTTLLGVLFCFNKR 7.1 -46.7° 2.3 45.0 -14.6
Prolines* EIEAIVVPVCLAFLLTTLLGVLFCFNKR          

* Note: this sequence contains Pro residues. CATM substituted them with Ala during the modeling. The positions are marked.

Click on the model number to visualize its details below.

MODEL 1 DETAILS

Precited structure:


Click on the image to enlarge

Download model 1 structure: PDB, PyMOL session

List of hydrogen bonds:

Donor Acceptor Distance
B, 633, THR, HA A, 632, THR, O 3.21Å
B, 636, GLY, HA1 A, 633, THR, O 3.00Å
B, 637, VAL, HA A, 636, GLY, O 3.47Å
A, 633, THR, HA B, 632, THR, O 3.21Å
A, 636, GLY, HA1 B, 633, THR, O 3.00Å
A, 637, VAL, HA B, 636, GLY, O 3.47Å