GPCR Sequence:

>sp|P35367|HRH1_HUMAN Histamine H1 receptor OS=Homo sapiens GN=HRH1 PE=1 SV=1
MSLPNSSCLLEDKMCEGNKTTMASPQLMPLVVVLSTICLVTVGLNLLVLYAVRSERKLHT
VGNLYIVSLSVADLIVGAVVMPMNILYLLMSKWSLGRPLCLFWLSMDYVASTASIFSVFI
LCIDRYRSVQQPLRYLKYRTKTRASATILGAWFLSFLWVIPILGWNHFMQQTSVRREDKC
ETDFYDVTWFKVMTAIINFYLPTLLMLWFYAKIYKAVRQHCQHRELINRSLPSFSEIKLR
PENPKGDAKKPGKESPWEVLKRKPKDAGGGSVLKSPSQTPKEMKSPVVFSQEDDREVDKL
YCFPLDIVHMQAAAEGSSRDYVAVNRSHGQLKTDEQGLNTHGASEISEDQMLGDSQSFSR
TDSDTTTETAPGKGKLRSGSNTGLDYIKFTWKRLRSHSRQYVSGLHMNRERKAAKQLGFI
MAAFILCWIPYFIFFMVIAFCKNCCNEHLHMFTIWLGYINSTLNPLIYPLCNENFKKTFK
RILHIRS

Estimation of the GPCR-I-TASSER model for P35367

C-score = -0.200
TM-score = 0.690 (estimated)
RMSD = 7.7 A (estimated)

Here, C-score is a confidence score of the GPCR-I-TASSER predictions which is typically in [-5,2]. TM-score and RMSD measure how close the model is to the native structure and both are estimated based on the C-score. TM-score is in [0,1] with a value >0.5 implying the model of correct topology. The TM-score and RMSD estimations are made only for the first model because absolute values of TM-score and RMSD for the lower-rank models do not strongly correlate with the C-score. The models are ranked based on the structure density of GPCR-I-TASSER simulations.

The top ten threading templates used by GPCR-I-TASSER

Rank	PDB ID	Z-score	Download Templates
1	2rh1A	3.155	template1
2	2rh1_A	6.971	template2
3	3pbla	2.316	template3
4	3ny8a	6.778	template4
5	3emlA	4.264	template5
6	2rh1A	3.653	template6
7	2rh1_A	6.107	template7
8	hs2rh1	6.754	template8
9	3ny8a	5.239	template9
10	3pblA	3.112	template10
(a) Rank of templates represents the top ten threading templates used by GPCR-I-TASSER. (b) Z-score is the normalized Z-score of the threading alignments. Alignment with a Normalized Z-score >1 mean a good alignment and vice versa. (c) Download Templates provides the 3D structure of the aligned regions of the threading templates.

Reference:

J Zhang, J Yang, R Jang, Y Zhang, Novel hybrid approach to G protein-coupled receptor structure modeling and case study on human genome, submitted, 2014.

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