Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4322
Number of amino acids:509
Molecular Weight:54073.67 Da
Theoretical pI:5.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)438.45%
Cysteine CYS (C)122.36%
Glutamic Acid GLU (E)295.7%
Aspartic Acid ASP (D)224.32%
Glycine GLY (G)6412.57%
Phynylalanine PHE (F)254.91%
Isoleucine ILE (I)295.7%
Histidine HIS (H)61.18%
Lysine LYS (K)285.5%
Methionine MET (M)142.75%
Leucine LEU (L)397.66%
Asparagine ASN (N)152.95%
Glutamine GLN (Q)244.72%
Proline PRO (P)224.32%
Serine SER (S)428.25%
Arginine ARG (R)122.36%
Threonine THR (T)234.52%
Tryptophan TRP (W)61.18%
Valine VAL (V)397.66%
Tyrosine TYR (Y)152.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2409
HydrogenH3756
NitrogenN630
OxygenO731
SulphurS26

FormulaC2409H3756N630O731S26
Total Number of Atoms:7552


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):51
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    56100
Absorption 0.1% (=1 g/l)    1.037,   assuming all pairs of CYS residues form cystines

Ext. coefficient    55350
Absorption 0.1% (=1 g/l)    1.024,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.06, 28.09, 24.56]

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:82.7701
Grand average of hydropathicity (GRAVY):0.03