Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5562
Number of amino acids:98
Molecular Weight:10853.48 Da
Theoretical pI:8.14


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)99.18%
Glutamic Acid GLU (E)44.08%
Aspartic Acid ASP (D)55.1%
Glycine GLY (G)1414.29%
Phynylalanine PHE (F)55.1%
Isoleucine ILE (I)44.08%
Histidine HIS (H)11.02%
Lysine LYS (K)44.08%
Methionine MET (M)22.04%
Leucine LEU (L)1111.22%
Asparagine ASN (N)44.08%
Glutamine GLN (Q)00%
Proline PRO (P)77.14%
Serine SER (S)77.14%
Arginine ARG (R)77.14%
Threonine THR (T)77.14%
Tryptophan TRP (W)22.04%
Valine VAL (V)11.02%
Tyrosine TYR (Y)44.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC475
HydrogenH731
NitrogenN131
OxygenO139
SulphurS11

FormulaC475H731N131O139S11
Total Number of Atoms:1487


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17460
Absorption 0.1% (=1 g/l)    1.609,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16960
Absorption 0.1% (=1 g/l)    1.563,   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 : 30.38

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.55, 32.65, 17.35]

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:62.6531
Grand average of hydropathicity (GRAVY):-0.26