Reviewed, UniProtKB/Swiss-Prot Q5MIB6 (PYGB_SHEEP)

Names and origin

Protein names

Recommended name:
    Glycogen phosphorylase, brain form
    EC=2.4.1.1

Gene names

Name:

PYGB

Organism

Ovis aries (Sheep)

Taxonomic identifier

9940 [NCBI]

Taxonomic lineage

Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Laurasiatheria › Cetartiodactyla › Ruminantia › Pecora › Bovidae › Caprinae › Ovis

Protein attributes

Sequence length	843 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Evidence at transcript level.

General annotation (Comments)

Function	Phosphorylase is an important allosteric enzyme in carbohydrate metabolism. Enzymes from different sources differ in their regulatory mechanisms and in their natural substrates. However, all known phosphorylases share catalytic and structural properties By similarity.
Catalytic activity	(1,4-alpha-D-glucosyl)(n) + phosphate = (1,4-alpha-D-glucosyl)(n-1) + alpha-D-glucose 1-phosphate.
Cofactor	Pyridoxal phosphate By similarity.
Enzyme regulation	Activity of phosphorylase is controlled both by allosteric means (through the noncovalent binding of metabolites) and by covalent modification. Thus AMP allosterically activates, whereas ATP, ADP, and glucose-6-phosphate allosterically inhibit, phosphorylase B By similarity.
Subunit structure	Homodimer. Dimers associate into a tetramer to form the enzymatically active phosphorylase A By similarity.
Post-translational modification	Phosphorylation of Ser-15 converts phosphorylase B (unphosphorylated) to phosphorylase A By similarity.
Sequence similarities	Belongs to the glycogen phosphorylase family.

Ontologies

Keywords
Biological process	Carbohydrate metabolism Glycogen metabolism
Ligand	Pyridoxal phosphate
Molecular function	Glycosyltransferase Transferase
PTM	Acetylation Phosphoprotein
Technical term	Allosteric enzyme
Gene Ontology (GO)
Biological process	glycogen metabolic process Inferred from electronic annotation. Source: UniProtKB-KW
Molecular function	phosphorylase activity Inferred from electronic annotation. Source: EC pyridoxal phosphate binding Inferred from electronic annotation. Source: InterPro
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Initiator methionine	1	1	Removed By similarity
	Chain	2 – 843	842	Glycogen phosphorylase, brain form		PRO_0000188539
Sites
	Binding site	76	1	AMP By similarity
	Site	109	1	Involved in the association of subunits By similarity
	Site	143	1	Involved in the association of subunits By similarity
	Site	156	1	May be involved in allosteric control By similarity
Amino acid modifications
	Modified residue	2	1	N-acetylalanine By similarity
	Modified residue	15	1	Phosphoserine; by PHK; in form phosphorylase A By similarity
	Modified residue	76	1	Phosphotyrosine By similarity
	Modified residue	197	1	Phosphotyrosine By similarity
	Modified residue	473	1	Phosphotyrosine By similarity
	Modified residue	681	1	N6-(pyridoxal phosphate)lysine By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q5MIB6-1 [UniParc]. Last modified January 23, 2007. Version 3. Checksum: 2E1CF88779B54988	FASTA	843	96,314
	10 20 30 40 50 60 MAKPLTDGER RKQISVRGLA GLGDVAEVRK SFNRHLHFTL VKDRNVATRR DYYLALAHTV 70 80 90 100 110 120 RDHLVGRWIR TQQRYYERDP KRIYYLSLEF YMGRTLQNTM VNLGLQNACD EAIYQLGLDL 130 140 150 160 170 180 EELEEIEEDA GLGNGGLGRL AACFLDSMAT LGLAAYGYGI RYEFGIFNQK IVNGWQVEEA 190 200 210 220 230 240 DDWLRYGNPW EKARPEYMLP VHFYGRVEHS PEGVRWLDTQ VVLAMPYDTP VPGYKNDTVN 250 260 270 280 290 300 TMRLWSAKAP NDFKLHDFNV GGYIEAVLDR NLAENISRVL YPNDNFFEGK ELRLKQEYFV 310 320 330 340 350 360 VAATLQDIIR RFKSSKFGCR DPVRTSFETF PDKVAIQLND THPALAIPEL MRILVDVEKV 370 380 390 400 410 420 DWGKAWEITK KTCAYTNHTV LPEALERWPV SMFEKLLPRH LDIIYAINQR HLDHVAALFP 430 440 450 460 470 480 GDVDRLRRMS VIEEGDCKRI NMAHLCVIGS HAVNGVARIH SEIVRQSVFK DFYELEPEKF 490 500 510 520 530 540 QNKTNGITPR RWLLLCNPGL AETIVERIGE DFLTDLSQLK KLLPLVGDEA LIRDVAQVKQ 550 560 570 580 590 600 ENKVKFSAFL EKQYGVKVNP SSMFDVHVKR IHEYKRQLLN CLHVVTLYNR IKKDPTQAFV 610 620 630 640 650 660 PRTVMIGGKA APGYHMAKKI IKLVTSIGDI VNHDPIVGDR LKVIFLENYR VSLAEKVIPA 670 680 690 700 710 720 ADLSQQISTA GTEASGTGNM KFMLNGALTI GTMDGANVEM AEEAGAENLF IFGLRVEDVE 730 740 750 760 770 780 ALDRKGYNAH EYYNHLPELQ QAVDQINSGF FSPREPDCFK DVVNMLLNHD RFKVFADYEA 790 800 810 820 830 840 YVACQAQVDQ LYRNPKEWTK KVIRNIACSG KFSSDRTITE YARDIWGAEP PALQTPPPSL PRD

References

[1]	"Characterization of ovine brain and liver glycogen phosphorylases." Walker K.R., Blechynden L.M., Binz N., Laing N.G. Submitted (NOV-2004) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [MRNA]. Tissue: Heart.

Cross-references

Sequence databases
EMBLGenBankDDBJ	AY827550 mRNA. Translation: AAV87308.1.
RefSeq	NP_001020034.1.
UniGene	Oar.3180
3D structure databases
SMR	Q5MIB6. Positions 13-837.
ModBase	Search...
Protein family/group databases
CAZy	GT35. Glycosyltransferase Family 35.
Genome annotation databases
GeneID	554325.
Organism-specific databases
CTD	554325.
Phylogenomic databases
HOVERGEN	Q5MIB6.
Enzyme and pathway databases
BRENDA	2.4.1.1. 271.
Family and domain databases
InterPro	IPR011833. Glycg_phsphrylas. IPR000811. Glyco_trans_35. [Graphical view]
PANTHER	PTHR11468. Glyco_trans_35. 1 hit.
Pfam	PF00343. Phosphorylase. 1 hit. [Graphical view]
PIRSF	PIRSF000460. Pprylas_GlgP. 1 hit.
TIGRFAMs	TIGR02093. P_ylase. 1 hit.
PROSITE	PS00102. PHOSPHORYLASE. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

PYGB_SHEEP

Accession

Primary (citable) accession number: Q5MIB6

Entry history

Integrated into UniProtKB/Swiss-Prot:	April 26, 2005
Last sequence update:	January 23, 2007
Last modified:	September 1, 2009
This is version 32 of the entry and version 3 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HPI (Human Proteome Initiative)