SNRPA1

Functionⁱ

Involved in pre-mRNA splicing as component of the spliceosome (PubMed:11991638, PubMed:28502770, PubMed:28781166, PubMed:28076346, PubMed:27035939). Associated with sn-RNP U2, where it contributes to the binding of stem loop IV of U2 snRNA (PubMed:9716128, PubMed:27035939).6 Publications

GO - Molecular functionⁱ

RNA binding
Source: UniProtKB
Inferred from high throughput direct assayⁱ
- 22681889
U2 snRNA binding
Source: GO_Central
Inferred from biological aspect of ancestorⁱ
- 21873635

View the complete GO annotation on QuickGO ...

GO - Biological processⁱ

interleukin-12-mediated signaling pathway Source: Reactome
mRNA splicing, via spliceosome
Source: UniProtKB
Inferred from direct assayⁱ
- 28076346
- 28781166
RNA splicing
Source: ProtInc
Traceable author statementⁱ
- 2928112
spermatogenesis
Source: UniProtKB
Inferred from genetic interactionⁱ
- 27035939

View the complete GO annotation on QuickGO ...

Keywordsⁱ

Molecular function	Ribonucleoprotein, RNA-binding
Biological process	mRNA processing, mRNA splicing

Enzyme and pathway databases

Reactomeⁱ	R-HSA-72163 mRNA Splicing - Major Pathway R-HSA-8950505 Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation

Reactomeⁱ

R-HSA-72163 mRNA Splicing - Major Pathway
R-HSA-8950505 Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation

Names & Taxonomyⁱ

Protein namesⁱ	Recommended name: U2 small nuclear ribonucleoprotein A' Short name: U2 snRNP A'2 Publications
Gene namesⁱ	Name:SNRPA1
Organismⁱ	Homo sapiens (Human)
Taxonomic identifierⁱ	9606 [NCBI]
Taxonomic lineageⁱ	cellular organisms › Eukaryota › Opisthokonta › Metazoa › Eumetazoa › Bilateria › Deuterostomia › Chordata › Craniata › Vertebrata › Gnathostomata › Teleostomi › Euteleostomi › Sarcopterygii › Dipnotetrapodomorpha › Tetrapoda › Amniota › Mammalia › Theria › Eutheria › Boreoeutheria › Euarchontoglires › Primates › Haplorrhini › Simiiformes › Catarrhini › Hominoidea › Hominidae › Homininae › Homo
Proteomesⁱ	UP000005640 Componentⁱ: Chromosome 15

Organism-specific databases

EuPathDBⁱ	HostDB:ENSG00000131876.16
Human Gene Nomenclature Database More...HGNCⁱ	HGNC:11152 SNRPA1
MIMⁱ	603521 gene
neXtProtⁱ	NX_P09661

Keywords - Cellular componentⁱ

Nucleus, Spliceosome

Pathology & Biotechⁱ

Mutagenesis

Feature key	Position(s)	DescriptionActions	Length
Mutagenesisⁱ	15	Y → D: Results in defective spliceosome assembly. 1 Publication	1
Mutagenesisⁱ	27	R → Q: No change in spliceosome assembly. 1 Publication	1
Mutagenesisⁱ	68	T → K: No change in spliceosome assembly. 1 Publication	1
Mutagenesisⁱ	72	N → K: No change in spliceosome assembly. 1 Publication	1
Mutagenesisⁱ	73	N → K: No change in spliceosome assembly. 1 Publication	1
Mutagenesisⁱ	92	E → V: Results in defective spliceosome assembly. 1 Publication	1
Mutagenesisⁱ	148	Q → R: Results in defective spliceosome assembly. 1 Publication	1

Organism-specific databases

Open Targets More...OpenTargetsⁱ	ENSG00000131876
PharmGKBⁱ	PA35994

Polymorphism and mutation databases

BioMutaⁱ	SNRPA1
DMDMⁱ	31077165

PTM / Processingⁱ

Molecule processing

Feature key	Position(s)	DescriptionActions	Graphical view	Length
Initiator methionineⁱ		Removed1 Publication
ChainⁱPRO_0000074173	2 – 255	U2 small nuclear ribonucleoprotein A'Add BLAST		254

Amino acid modifications

Feature key	Position(s)	DescriptionActions	Length
Modified residueⁱ	172	N6-acetyllysine; alternateCombined sources	1
Cross-linkⁱ	172	Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO2); alternateCombined sources
Modified residueⁱ	178	PhosphoserineCombined sources	1
Modified residueⁱ	197	PhosphoserineCombined sources	1
Cross-linkⁱ	221	Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO2)Combined sources
Modified residueⁱ	236	PhosphoserineCombined sources	1
Modified residueⁱ	255	PhosphoserineCombined sources	1

Keywords - PTMⁱ

Acetylation, Isopeptide bond, Phosphoprotein, Ubl conjugation

Proteomic databases

EPDⁱ	P09661
MaxQB - The MaxQuant DataBase More...MaxQBⁱ	P09661
PaxDbⁱ	P09661
PeptideAtlas More...PeptideAtlasⁱ	P09661
PRIDEⁱ	P09661
ProteomicsDBⁱ	52261

PTM databases

iPTMnetⁱ	P09661
PhosphoSitePlusⁱ	P09661

Expressionⁱ

Gene expression databases

Bgeeⁱ	ENSG00000131876 Expressed in 92 organ(s), highest expression level in small intestine Peyer's patch
CleanExⁱ	HS_SNRPA1
ExpressionAtlasⁱ	P09661 baseline and differential
Genevisibleⁱ	P09661 HS

Organism-specific databases

Human Protein Atlas More...HPAⁱ	HPA045622 HPA048499

HPAⁱ

HPA045622
HPA048499

Interactionⁱ

Subunit structureⁱ

Identified in the spliceosome B complex (PubMed:28781166). Identified in the spliceosome C complex (PubMed:11991638, PubMed:28502770, PubMed:28076346). Found in a pre-mRNA splicing complex with SFRS4, SFRS5, SNRNP70, SNRPA1, SRRM1 and SRRM2 (PubMed:9531537). Found in a pre-mRNA exonic splicing enhancer (ESE) complex with SNRNP70, SNRPA1, SRRM1 and TRA2B (PubMed:10339552). Contributes to the binding of stem loop IV of U2 snRNA with SNRPB2 (PubMed:9716128, PubMed:27035939).8 Publications

Binary interactionsⁱ

With	Entry	#Exp.	IntAct	Notes
SNRPA	P09012	6	EBI-876439,EBI-607085
SNRPB2	P08579	2	EBI-876439,EBI-1053651

Protein-protein interaction databases

BioGridⁱ	112511, 149 interactors
CORUMⁱ	P09661
Database of interacting proteins More...DIPⁱ	DIP-625N
IntActⁱ	P09661, 30 interactors
Molecular INTeraction database More...MINTⁱ	P09661
STRINGⁱ	9606.ENSP00000254193

Structureⁱ

Secondary structure

Legend: HelixTurnBeta strandPDB Structure known for this area

Feature key	Position(s)	DescriptionActions	Length
Helixⁱ	6 – 10	Combined sources	5
Beta strandⁱ	14 – 16	Combined sources	3
Beta strandⁱ	22 – 25	Combined sources	4
Helixⁱ	37 – 40	Combined sources	4
Beta strandⁱ	45 – 48	Combined sources	4
Beta strandⁱ	68 – 70	Combined sources	3
Helixⁱ	83 – 86	Combined sources	4
Beta strandⁱ	92 – 94	Combined sources	3
Helixⁱ	103 – 111	Combined sources	9
Beta strandⁱ	117 – 119	Combined sources	3
Helixⁱ	124 – 127	Combined sources	4
Helixⁱ	131 – 138	Combined sources	8
Beta strandⁱ	143 – 145	Combined sources	3
Helixⁱ	152 – 160	Combined sources	9
Helixⁱ	165 – 172	Combined sources	8

Show more details

3D structure databases

ProteinModelPortalⁱ	P09661
SMRⁱ	P09661
ModBaseⁱ	Search...
MobiDBⁱ	Search...

Miscellaneous databases

EvolutionaryTraceⁱ

P09661

Family & Domainsⁱ

Domains and Repeats

Feature key	Position(s)	DescriptionActions	Length
Repeatⁱ	20 – 41	LRR 1Add BLAST	22
Repeatⁱ	43 – 64	LRR 2Add BLAST	22
Repeatⁱ	65 – 86	LRR 3Add BLAST	22
Repeatⁱ	89 – 110	LRR 4Add BLAST	22
Domainⁱ	123 – 161	LRRCTAdd BLAST	39

Sequence similaritiesⁱ

Belongs to the U2 small nuclear ribonucleoprotein A family.Curated

Keywords - Domainⁱ

Leucine-rich repeat, Repeat

Phylogenomic databases

eggNOGⁱ	KOG1644 Eukaryota COG4886 LUCA
Ensembl GeneTree More...GeneTreeⁱ	ENSGT00510000047131
HOGENOMⁱ	HOG000175472
HOVERGENⁱ	HBG007330
KEGG Orthology (KO) More...KOⁱ	K11092
OMAⁱ	TKPNYRE
Database of Orthologous Groups More...OrthoDBⁱ	EOG091G0M17
PhylomeDBⁱ	P09661
TreeFamⁱ	TF313776

Family and domain databases

Gene3Dⁱ	3.80.10.10, 1 hit
InterProⁱ	View protein in InterPro IPR001611 Leu-rich_rpt IPR032675 LRR_dom_sf IPR003603 U2A'_phosphoprotein32A_C
SMARTⁱ	View protein in SMART SM00446 LRRcap, 1 hit
PROSITEⁱ	View protein in PROSITE PS51450 LRR, 4 hits

Sequence (1+)ⁱ

Sequence statusⁱ: Complete.

Sequence processingⁱ: The displayed sequence is further processed into a mature form.

This entry has 1 described isoform and 3 potential isoforms that are computationally mapped.Show all Align All

P09661-1 [UniParc]FASTA Add to basket

« Hide

        10         20         30         40         50
MVKLTAELIE QAAQYTNAVR DRELDLRGYK IPVIENLGAT LDQFDAIDFS 
        60         70         80         90        100
DNEIRKLDGF PLLRRLKTLL VNNNRICRIG EGLDQALPCL TELILTNNSL 
       110        120        130        140        150
VELGDLDPLA SLKSLTYLSI LRNPVTNKKH YRLYVIYKVP QVRVLDFQKV 
       160        170        180        190        200
KLKERQEAEK MFKGKRGAQL AKDIARRSKT FNPGAGLPTD KKKGGPSPGD 
       210        220        230        240        250
VEAIKNAIAN ASTLAEVERL KGLLQSGQIP GRERRSGPTD DGEEEMEEDT 

VTNGS

Length:255

Mass (Da):28,416

Last modified:May 23, 2003 - v2

Checksum:ⁱ25902F07992B7209

GO

Computationally mapped potential isoform sequencesⁱ

There are 3 potential isoforms mapped to this entry.BLAST Align Show all Add to basket

Entry	Entry name	Protein names	Gene names	Length	Annotation

H0YKK0	H0YKK0_HUMAN	Small nuclear ribonucleoprotein pol... Small nuclear ribonucleoprotein polypeptide A', isoform CRA_a (U2 small nuclear ribonucleoprotein A')	SNRPA1 hCG_1992004	154	Annotation score:
H0YMA0	H0YMA0_HUMAN	U2 small nuclear ribonucleoprotein ... U2 small nuclear ribonucleoprotein A'	SNRPA1	142	Annotation score:
H0YLR3	H0YLR3_HUMAN	U2 small nuclear ribonucleoprotein ... U2 small nuclear ribonucleoprotein A'	SNRPA1	89	Annotation score:

Experimental Info

Feature key	Position(s)	DescriptionActions	Graphical view	Length
Sequence conflictⁱ	193	K → R in CAA31838 (PubMed:2928112).Curated		1

Sequence databases

Select the link destinations: EMBLⁱ GenBankⁱ DDBJⁱ Links Updated	X13482 mRNA Translation: CAA31838.1 AK312200 mRNA Translation: BAG35133.1 CH471101 Genomic DNA Translation: EAX02300.1 BC022816 mRNA Translation: AAH22816.1 BC071717 mRNA Translation: AAH71717.1
The Consensus CDS (CCDS) project More...CCDSⁱ	CCDS10391.1
PIRⁱ	S03616
NCBI Reference Sequences More...RefSeqⁱ	NP_003081.2, NM_003090.3
UniGeneⁱ	Hs.528763

Genome annotation databases

Ensemblⁱ	ENST00000254193; ENSP00000254193; ENSG00000131876
GeneIDⁱ	6627
KEGGⁱ	hsa:6627
UCSC genome browser More...UCSCⁱ	uc002bww.4 human

Similar proteinsⁱ

100% Identity
90% Identity
50% Identity

Protein	Similar proteins		Species	Score	Length	Source
P09661	U2 small nuclear ribonucleoprotein A'		MACFA		255	UniRef100_P09661
U2 snRNP-specific A' protein		HUMAN		28
Small nuclear ribonucleoprotein polypeptide A (Fragment)		MUSPF		161
Small nuclear ribonucleoprotein polypeptide A (Fragment)		NEOVI		153
Uncharacterized protein (Fragment)		AILME		134
+38

Protein	Similar proteins		Species	Score	Length	Source
P09661	U2 small nuclear ribonucleoprotein A'		MACFA		255	UniRef90_P09661
U2 snRNP-specific A' protein		HUMAN		28
Small nuclear ribonucleoprotein polypeptide A (Fragment)		MUSPF		161
Small nuclear ribonucleoprotein polypeptide A (Fragment)		NEOVI		153
Uncharacterized protein (Fragment)		AILME		134
+39

Protein	Similar proteins		Species	Score	Length	Source
P09661	Proprotein convertase subtilisin/kexin type 6		HUMAN		969	UniRef50_P29122
Proprotein convertase subtilisin/kexin type 6		RAT		937
U2 small nuclear ribonucleoprotein A'		MACFA		255
proprotein convertase subtilisin/kexin type 6		LIPVE		1138
proprotein convertase subtilisin/kexin type 6 isoform X1		PHYCD		986
+215

Cross-referencesⁱ

Sequence databases

Select the link destinations: EMBLⁱ GenBankⁱ DDBJⁱ Links Updated	X13482 mRNA Translation: CAA31838.1 AK312200 mRNA Translation: BAG35133.1 CH471101 Genomic DNA Translation: EAX02300.1 BC022816 mRNA Translation: AAH22816.1 BC071717 mRNA Translation: AAH71717.1
CCDSⁱ	CCDS10391.1
PIRⁱ	S03616
RefSeqⁱ	NP_003081.2, NM_003090.3
UniGeneⁱ	Hs.528763

3D structure databases

Select the link destinations: Protein Data Bank Europe More...PDBeⁱ Protein Data Bank RCSB More...RCSB PDBⁱ Protein Data Bank Japan More...PDBjⁱ Links Updated	PDB entry	Method	Resolution (Å)	Chain	Positions	PDBsum
	1A9N	X-ray	2.38	A/C	1-176	[»]
	5MQF	electron microscopy	5.90	W	1-255	[»]
	5O9Z	electron microscopy	4.50	z	1-255	[»]
	5XJC	electron microscopy	3.60	o	1-255	[»]
	5YZG	electron microscopy	4.10	o	1-255	[»]
	5Z56	electron microscopy	5.10	o	1-255	[»]
	5Z57	electron microscopy	6.50	o	1-255	[»]
	5Z58	electron microscopy	4.90	o	1-255	[»]
ProteinModelPortalⁱ	P09661
SMRⁱ	P09661
ModBaseⁱ	Search...
MobiDBⁱ	Search...

Protein-protein interaction databases

BioGridⁱ	112511, 149 interactors
CORUMⁱ	P09661
DIPⁱ	DIP-625N
IntActⁱ	P09661, 30 interactors
MINTⁱ	P09661
STRINGⁱ	9606.ENSP00000254193

PTM databases

iPTMnetⁱ	P09661
PhosphoSitePlusⁱ	P09661

Polymorphism and mutation databases

BioMutaⁱ	SNRPA1
DMDMⁱ	31077165

Proteomic databases

EPDⁱ	P09661
MaxQBⁱ	P09661
PaxDbⁱ	P09661
PeptideAtlasⁱ	P09661
PRIDEⁱ	P09661
ProteomicsDBⁱ	52261

Protocols and materials databases

The DNASU plasmid repository More...DNASUⁱ	6627
Structural Biology Knowledgebase	Search...

Genome annotation databases

Ensemblⁱ	ENST00000254193; ENSP00000254193; ENSG00000131876
GeneIDⁱ	6627
KEGGⁱ	hsa:6627
UCSCⁱ	uc002bww.4 human

Organism-specific databases

CTDⁱ	6627
EuPathDBⁱ	HostDB:ENSG00000131876.16
GeneCardsⁱ	SNRPA1
H-InvDBⁱ	HIX0203213
HGNCⁱ	HGNC:11152 SNRPA1
HPAⁱ	HPA045622 HPA048499
MIMⁱ	603521 gene
neXtProtⁱ	NX_P09661
OpenTargetsⁱ	ENSG00000131876
PharmGKBⁱ	PA35994
GenAtlas: human gene database More...GenAtlasⁱ	Search...

Phylogenomic databases

eggNOGⁱ	KOG1644 Eukaryota COG4886 LUCA
GeneTreeⁱ	ENSGT00510000047131
HOGENOMⁱ	HOG000175472
HOVERGENⁱ	HBG007330
KOⁱ	K11092
OMAⁱ	TKPNYRE
OrthoDBⁱ	EOG091G0M17
PhylomeDBⁱ	P09661
TreeFamⁱ	TF313776

Enzyme and pathway databases

Reactomeⁱ	R-HSA-72163 mRNA Splicing - Major Pathway R-HSA-8950505 Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation

Reactomeⁱ

R-HSA-72163 mRNA Splicing - Major Pathway
R-HSA-8950505 Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation

Miscellaneous databases

EvolutionaryTraceⁱ	P09661
GeneWikiⁱ	SNRPA1
GenomeRNAiⁱ	6627
Protein Ontology More...PROⁱ	PR:P09661
SOURCEⁱ	Search...

Gene expression databases

Bgeeⁱ	ENSG00000131876 Expressed in 92 organ(s), highest expression level in small intestine Peyer's patch
CleanExⁱ	HS_SNRPA1
ExpressionAtlasⁱ	P09661 baseline and differential
Genevisibleⁱ	P09661 HS

Family and domain databases

Gene3Dⁱ	3.80.10.10, 1 hit
InterProⁱ	View protein in InterPro IPR001611 Leu-rich_rpt IPR032675 LRR_dom_sf IPR003603 U2A'_phosphoprotein32A_C
SMARTⁱ	View protein in SMART SM00446 LRRcap, 1 hit
PROSITEⁱ	View protein in PROSITE PS51450 LRR, 4 hits
ProtoNetⁱ	Search...

Entry informationⁱ

Entry nameⁱ	RU2A_HUMAN
Accessionⁱ	P09661Primary (citable) accession number: P09661 Secondary accession number(s): B2R5I6, Q8TBD2
Entry historyⁱ	Integrated into UniProtKB/Swiss-Prot:	July 1, 1989
	Last sequence update:	May 23, 2003
	Last modified:	November 7, 2018
	This is version 189 of the entry and version 2 of the sequence. See complete history.
Entry statusⁱ	Reviewed (UniProtKB/Swiss-Prot)
Annotation program	Chordata Protein Annotation Program
Disclaimer	Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

Miscellaneousⁱ

Keywords - Technical termⁱ

3D-structure, Complete proteome, Direct protein sequencing, Reference proteome

Documents

SIMILARITY comments
Index of protein domains and families
MIM cross-references
Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
PDB cross-references
Index of Protein Data Bank (PDB) cross-references
Human chromosome 15
Human chromosome 15: entries, gene names and cross-references to MIM

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UniProtKB - P09661 (RU2A_HUMAN)

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U2 small nuclear ribonucleoprotein A'

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<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

Enzyme and pathway databases

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

Organism-specific databases

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Nucleus

Nucleus

Keywords - Cellular componenti

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

Mutagenesis

Organism-specific databases

Polymorphism and mutation databases

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Amino acid modifications

Keywords - PTMi

Proteomic databases

PTM databases

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

Gene expression databases

Organism-specific databases

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

Protein-protein interaction databases

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

Secondary structure

3D structure databases

Miscellaneous databases

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Keywords - Domaini

Phylogenomic databases

Family and domain databases

Experimental Info

Sequence databases

Genome annotation databases

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

3D structure databases

Protein-protein interaction databases

PTM databases

Polymorphism and mutation databases

Proteomic databases

Protocols and materials databases

Genome annotation databases

Organism-specific databases

Phylogenomic databases

Enzyme and pathway databases

Miscellaneous databases

Gene expression databases

Family and domain databases

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This section contains any relevant information that doesn’t fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

Documents

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Functionⁱ

GO - Molecular functionⁱ

GO - Biological processⁱ

Names & Taxonomyⁱ

Subcellular locationⁱ

Keywords - Cellular componentⁱ

Pathology & Biotechⁱ

PTM / Processingⁱ

Keywords - PTMⁱ

Expressionⁱ

Interactionⁱ

Structureⁱ

Family & Domainsⁱ

Sequence similaritiesⁱ

Keywords - Domainⁱ

Cross-referencesⁱ

Entry informationⁱ

Miscellaneousⁱ

Keywords - Technical termⁱ