Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4891
Number of amino acids:346
Molecular Weight:37740.97 Da
Theoretical pI:7.09


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)267.51%
Cysteine CYS (C)82.31%
Glutamic Acid GLU (E)154.34%
Aspartic Acid ASP (D)164.62%
Glycine GLY (G)308.67%
Phynylalanine PHE (F)185.2%
Isoleucine ILE (I)195.49%
Histidine HIS (H)51.45%
Lysine LYS (K)154.34%
Methionine MET (M)61.73%
Leucine LEU (L)3911.27%
Asparagine ASN (N)236.65%
Glutamine GLN (Q)154.34%
Proline PRO (P)185.2%
Serine SER (S)298.38%
Arginine ARG (R)164.62%
Threonine THR (T)195.49%
Tryptophan TRP (W)30.87%
Valine VAL (V)174.91%
Tyrosine TYR (Y)92.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1676
HydrogenH2634
NitrogenN460
OxygenO504
SulphurS14

FormulaC1676H2634N460O504S14
Total Number of Atoms:5288


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

Ext. coefficient    30410
Absorption 0.1% (=1 g/l)    0.806,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    0.793,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.32

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.35, 28.90, 24.86]

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:87.1388
Grand average of hydropathicity (GRAVY):-0.13