Details of Host Protein

Host Protein General Information (ID: PT1112)
Protein Name	Surfeit locus protein 4 (HNRNPL)	Gene Name	SURF4
Host Species	Homo sapiens	Uniprot Entry Name	SURF4_HUMAN
Protein Families	SURF4 family
Subcellular Location	Endoplasmic reticulum membrane
External Link
	NCBI Gene ID	6836
	Uniprot ID	O15260
	Ensembl ID	ENSG00000282947
	HGNC ID	HGNC:11476
Function in Host	Endoplasmic reticulum cargo receptor that mediates the exportof lipoproteins by recruiting cargos into COPII vesicles to facilitatetheir secretion. Acts as a cargo receptor for lipoproteins bearing both APOB and APOA1, thereby regulating lipoprotein delivery and the maintenance of lipidhomeostasis. Synergizes with theGTPase SAR1B to mediate transport of circulating lipoproteins. Promotes the secretion of PCSK9. Also mediates the efficient secretion of erythropoietin (EPO). May also play a role in the maintenance of thearchitecture of the endoplasmic reticulum-Golgi intermediatecompartment and of the Golgi. [1-3] Click to Show/Hide
3D Structure	AlphaFold ID: O15260 2D PNG Download mmCIF File Download PDB File Download

Function of This Protein During Virus Infection
Virus Name	SARS-COV-2	Protein Function	Anti-viral	[4]
Infected Tissue	Lung	Infection Time	7-9 Days
Infected Cell	Calu-3 Cells (Human epithelial cell line)	Cellosaurus ID	CVCL_0609
Method Description	To detect the role of host protein SURF4 in viral infection, SURF4 protein knockdown Calu-3 Cells were infected with SARS-COV-2 for 7 - 9 Days , and the effects on infection was detected through CRISPR-based genome-wide gene-knockout screen.
Results	It is reported that knockout of SURF4 increases SARS-CoV-2 RNA levels compared with control group.

Full List of Virus RNA Interacting with This Protien
*RNA Region: 3'-UTR (hCoV-19/IPBCAMS-YL01/2020 )*
RNA Region Details	RNA Info Click to show the detail information of this RNA binding region	[5]
Strains Name	hCoV-19/IPBCAMS-YL01/2020
Strains Family	Beta (B.1.351)
RNA Binding Region	3'-UTR
Virus Name	Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
Interaction Type	Unlikely to be direct binder
Infection Cells	Huh7.5.1 cells (Hepatocyte derived cellular carcinoma cell) (CVCL_E049 )
Cell Originated Tissue	Liver
Infection Time	30 h
Interaction Score	MIST = 0.685516039
Method Description	comprehensive identification of RNA-binding proteins by massspectrometry (ChIRP-MS)

Differential Gene Expression During SARS-COV-2 Infection

GEO Accession: GSE152641

Sample Type: Blood

Samples Details: Healthy Control: 24; COVID-19: 62

Platform: GPL24676 Illumina NovaSeq 6000

PNG Download

GEO Accession: GSE162835

Sample Type: Nasopharyngeal Swabs

Samples Details: COVID-19 (Mild Symptoms): 37; COVID-19 (Moderate Symptoms): 10; COVID-19 (Severe Symptoms): 3

Platform: GPL24676 Illumina NovaSeq 6000

PNG Download

Protein Sequence Information
MGQNDLMGTAEDFADQFLRVTKQYLPHVARLCLISTFLEDGIRMWFQWSEQRDYIDTTWNCGYLLASSFVFLNLLGQLTGCVLVLSRNFVQYACFGLFGIIALQTIAYSILWDLKFLMRNLALGGGLLLLLAESRSEGKSMFAGVPTMRESSPKQYMQLGGRVLLVLMFMTLLHFDASFFSIVQNIVGTALMILVAIGFKTKLAALTLVVWLFAINVYFNAFWTIPVYKPMHDFLKYDFFQTMSVIGGLLLVVALGPGGVSMDEKKKEW Click to Show/Hide

References
1	Receptor-Mediated ER Export of Lipoproteins Controls Lipid Homeostasis in Mice and Humans. Cell Metab. 2021 Feb 2;33(2):350-366.e7.
2	The cargo receptor SURF4 promotes the efficient cellular secretion of PCSK9. Elife. 2018 Sep 25;7:e38839.
3	SFT-4/Surf4 control ER export of soluble cargo proteins and participate in ER exit site organization. J Cell Biol. 2018 Jun 4;217(6):2073-2085.
4	Genome-wide CRISPR screens identify GATA6 as a proviral host factor for SARS-CoV-2 via modulation of ACE2. Nat Commun. 2022 Apr 25;13(1):2237.
5	Comparison of viral RNA-host protein interactomes across pathogenic RNA viruses informs rapid antiviral drug discovery for SARS-CoV-2. Cell Res. 2022 Jan;32(1):9-23.