Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4183
Number of amino acids:303
Molecular Weight:33160 Da
Theoretical pI:6.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3611.88%
Cysteine CYS (C)61.98%
Glutamic Acid GLU (E)154.95%
Aspartic Acid ASP (D)175.61%
Glycine GLY (G)175.61%
Phynylalanine PHE (F)175.61%
Isoleucine ILE (I)92.97%
Histidine HIS (H)92.97%
Lysine LYS (K)165.28%
Methionine MET (M)41.32%
Leucine LEU (L)299.57%
Asparagine ASN (N)61.98%
Glutamine GLN (Q)103.3%
Proline PRO (P)175.61%
Serine SER (S)247.92%
Arginine ARG (R)154.95%
Threonine THR (T)144.62%
Tryptophan TRP (W)41.32%
Valine VAL (V)309.9%
Tyrosine TYR (Y)82.64%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1497
HydrogenH2330
NitrogenN402
OxygenO430
SulphurS10

FormulaC1497H2330N402O430S10
Total Number of Atoms:4669


Total number of positively charged residues (ARG + LYS):31
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34295
Absorption 0.1% (=1 g/l)    1.034,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33920
Absorption 0.1% (=1 g/l)    1.023,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.69

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.01, 21.12, 27.72]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:89.505
Grand average of hydropathicity (GRAVY):0.03