Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4097
Number of amino acids:361
Molecular Weight:39496.97 Da
Theoretical pI:5.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)349.42%
Cysteine CYS (C)61.66%
Glutamic Acid GLU (E)298.03%
Aspartic Acid ASP (D)246.65%
Glycine GLY (G)277.48%
Phynylalanine PHE (F)154.16%
Isoleucine ILE (I)113.05%
Histidine HIS (H)41.11%
Lysine LYS (K)4111.36%
Methionine MET (M)10.28%
Leucine LEU (L)359.7%
Asparagine ASN (N)102.77%
Glutamine GLN (Q)82.22%
Proline PRO (P)133.6%
Serine SER (S)277.48%
Arginine ARG (R)82.22%
Threonine THR (T)174.71%
Tryptophan TRP (W)41.11%
Valine VAL (V)339.14%
Tyrosine TYR (Y)143.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1778
HydrogenH2804
NitrogenN456
OxygenO544
SulphurS7

FormulaC1778H2804N456O544S7
Total Number of Atoms:5589


Total number of positively charged residues (ARG + LYS):49
Total number of negatively charged residues (ASP + GLU):53
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    43235
Absorption 0.1% (=1 g/l)    1.095,   assuming all pairs of CYS residues form cystines

Ext. coefficient    42860
Absorption 0.1% (=1 g/l)    1.085,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.30

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.02, 21.33, 27.42]

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:85.6232
Grand average of hydropathicity (GRAVY):-0.28