Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4930
Number of amino acids:358
Molecular Weight:39541.68 Da
Theoretical pI:6.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)246.7%
Cysteine CYS (C)92.51%
Glutamic Acid GLU (E)236.42%
Aspartic Acid ASP (D)174.75%
Glycine GLY (G)349.5%
Phynylalanine PHE (F)195.31%
Isoleucine ILE (I)133.63%
Histidine HIS (H)102.79%
Lysine LYS (K)267.26%
Methionine MET (M)71.96%
Leucine LEU (L)287.82%
Asparagine ASN (N)185.03%
Glutamine GLN (Q)133.63%
Proline PRO (P)92.51%
Serine SER (S)308.38%
Arginine ARG (R)102.79%
Threonine THR (T)195.31%
Tryptophan TRP (W)61.68%
Valine VAL (V)298.1%
Tyrosine TYR (Y)143.91%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1763
HydrogenH2707
NitrogenN471
OxygenO533
SulphurS16

FormulaC1763H2707N471O533S16
Total Number of Atoms:5490


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):40
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    54360
Absorption 0.1% (=1 g/l)    1.375,   assuming all pairs of CYS residues form cystines

Ext. coefficient    53860
Absorption 0.1% (=1 g/l)    1.362,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.81

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.45, 25.42, 22.91]

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:74.8603
Grand average of hydropathicity (GRAVY):-0.27