Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5661
Number of amino acids:348
Molecular Weight:38787.99 Da
Theoretical pI:8.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)185.17%
Cysteine CYS (C)82.3%
Glutamic Acid GLU (E)236.61%
Aspartic Acid ASP (D)144.02%
Glycine GLY (G)3510.06%
Phynylalanine PHE (F)144.02%
Isoleucine ILE (I)205.75%
Histidine HIS (H)61.72%
Lysine LYS (K)298.33%
Methionine MET (M)41.15%
Leucine LEU (L)246.9%
Asparagine ASN (N)246.9%
Glutamine GLN (Q)102.87%
Proline PRO (P)144.02%
Serine SER (S)267.47%
Arginine ARG (R)133.74%
Threonine THR (T)144.02%
Tryptophan TRP (W)61.72%
Valine VAL (V)277.76%
Tyrosine TYR (Y)195.46%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1739
HydrogenH2684
NitrogenN468
OxygenO516
SulphurS12

FormulaC1739H2684N468O516S12
Total Number of Atoms:5419


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):37
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    61810
Absorption 0.1% (=1 g/l)    1.594,   assuming all pairs of CYS residues form cystines

Ext. coefficient    61310
Absorption 0.1% (=1 g/l)    1.581,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.64

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.61, 28.45, 19.83]

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:76.9828
Grand average of hydropathicity (GRAVY):-0.41